src/imap.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include "imap.h"
  32 #include "imap_gtk.h"
  33 #include "inc.h"
  34 #include "xml.h"
  35 #include "alertpanel.h"
  36
  37 #ifdef HAVE_LIBETPAN
  38
  39 #include <stdlib.h>
  40 #include <dirent.h>
  41 #include <unistd.h>
  42 #include <ctype.h>
  43 #include <time.h>
  44 #include <errno.h>
  45 #if HAVE_ICONV
  46 #  include <iconv.h>
  47 #endif
  48
  49 #ifdef USE_GNUTLS
  50 #  include "ssl.h"
  51 #endif
  52
  53 #include "folder.h"
  54 #include "session.h"
  55 #include "procmsg.h"
  56 #include "socket.h"
  57 #include "recv.h"
  58 #include "procheader.h"
  59 #include "prefs_account.h"
  60 #include "codeconv.h"
  61 #include "md5.h"
  62 #include "base64.h"
  63 #include "utils.h"
  64 #include "prefs_common.h"
  65 #include "inputdialog.h"
  66 #include "log.h"
  67 #include "remotefolder.h"
  68 #include "claws.h"
  69 #include "statusbar.h"
  70 #include "msgcache.h"
  71 #include "imap-thread.h"
  72 #include "account.h"
  73 #include "tags.h"
  74 #include "main.h"
  75
  76 typedef struct _IMAPFolder      IMAPFolder;
  77 typedef struct _IMAPSession     IMAPSession;
  78 typedef struct _IMAPNameSpace   IMAPNameSpace;
  79 typedef struct _IMAPFolderItem  IMAPFolderItem;
  80
  81 #include "prefs_account.h"
  82
  83 #define IMAP_FOLDER(obj)        ((IMAPFolder *)obj)
  84 #define IMAP_FOLDER_ITEM(obj)   ((IMAPFolderItem *)obj)
  85 #define IMAP_SESSION(obj)       ((IMAPSession *)obj)
  86
  87 struct _IMAPFolder
  88 {
  89         RemoteFolder rfolder;
  90
  91         /* list of IMAPNameSpace */
  92         GList *ns_personal;
  93         GList *ns_others;
  94         GList *ns_shared;
  95         gchar last_seen_separator;
  96         guint refcnt;
  97         guint max_set_size;
  98         gchar *search_charset;
  99         gboolean search_charset_supported;
 100 };
 101
 102 struct _IMAPSession
 103 {
 104         Session session;
 105
 106         gboolean authenticated;
 107
 108         GSList *capability;
 109         gboolean uidplus;
 110
 111         gchar *mbox;
 112         guint cmd_count;
 113
 114         /* CLAWS */
 115         gboolean folder_content_changed;
 116         guint exists;
 117         guint recent;
 118         guint expunge;
 119         guint unseen;
 120         guint uid_validity;
 121         guint uid_next;
 122
 123         Folder * folder;
 124         gboolean busy;
 125         gboolean cancelled;
 126         gboolean sens_update_block;
 127         gboolean do_destroy;
 128 };
 129
 130 struct _IMAPNameSpace
 131 {
 132         gchar *name;
 133         gchar separator;
 134 };
 135
 136 #define IMAPBUFSIZE     8192
 137
 138 #define IMAP_IS_SEEN(flags)     ((flags & IMAP_FLAG_SEEN) != 0)
 139 #define IMAP_IS_ANSWERED(flags) ((flags & IMAP_FLAG_ANSWERED) != 0)
 140 #define IMAP_IS_FLAGGED(flags)  ((flags & IMAP_FLAG_FLAGGED) != 0)
 141 #define IMAP_IS_DELETED(flags)  ((flags & IMAP_FLAG_DELETED) != 0)
 142 #define IMAP_IS_DRAFT(flags)    ((flags & IMAP_FLAG_DRAFT) != 0)
 143 #define IMAP_IS_FORWARDED(flags)        ((flags & IMAP_FLAG_FORWARDED) != 0)
 144 #define IMAP_IS_SPAM(flags)     ((flags & IMAP_FLAG_SPAM) != 0)
 145 #define IMAP_IS_HAM(flags)      ((flags & IMAP_FLAG_HAM) != 0)
 146
 147
 148 #define IMAP4_PORT      143
 149 #ifdef USE_GNUTLS
 150 #define IMAPS_PORT      993
 151 #endif
 152
 153 #define IMAP_CMD_LIMIT  1000
 154
 155 enum {
 156         ITEM_CAN_CREATE_FLAGS_UNKNOWN = 0,
 157         ITEM_CAN_CREATE_FLAGS,
 158         ITEM_CANNOT_CREATE_FLAGS
 159 };
 160
 161 struct _IMAPFolderItem
 162 {
 163         FolderItem item;
 164
 165         guint lastuid;
 166         guint uid_next;
 167         GSList *uid_list;
 168         gboolean batching;
 169
 170         GHashTable *flags_set_table;
 171         GHashTable *flags_unset_table;
 172         guint32 last_change;
 173         guint32 last_sync;
 174         gboolean should_update;
 175         gboolean should_trash_cache;
 176         gint can_create_flags;
 177
 178         GHashTable *tags_set_table;
 179         GHashTable *tags_unset_table;
 180         GSList *ok_flags;
 181
 182 };
 183
 184 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
 185 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
 186
 187 static void imap_folder_init            (Folder         *folder,
 188                                          const gchar    *name,
 189                                          const gchar    *path);
 190
 191 static Folder   *imap_folder_new        (const gchar    *name,
 192                                          const gchar    *path);
 193 static void      imap_folder_destroy    (Folder         *folder);
 194
 195 static IMAPSession *imap_session_new    (Folder         *folder,
 196                                          const PrefsAccount     *account);
 197 static gint     imap_session_authenticate(IMAPSession   *session,
 198                                           PrefsAccount  *account);
 199 static void     imap_session_destroy    (Session        *session);
 200
 201 static gchar   *imap_fetch_msg          (Folder         *folder,
 202                                          FolderItem     *item,
 203                                          gint            uid);
 204 static gchar   *imap_fetch_msg_full     (Folder         *folder,
 205                                          FolderItem     *item,
 206                                          gint            uid,
 207                                          gboolean        headers,
 208                                          gboolean        body);
 209 static void     imap_remove_cached_msg  (Folder         *folder,
 210                                          FolderItem     *item,
 211                                          MsgInfo        *msginfo);
 212 static gint     imap_add_msg            (Folder         *folder,
 213                                          FolderItem     *dest,
 214                                          const gchar    *file,
 215                                          MsgFlags       *flags);
 216 static gint     imap_add_msgs           (Folder         *folder,
 217                                          FolderItem     *dest,
 218                                          GSList         *file_list,
 219                                          GHashTable     *relation);
 220
 221 static gint     imap_copy_msg           (Folder         *folder,
 222                                          FolderItem     *dest,
 223                                          MsgInfo        *msginfo);
 224 static gint     imap_copy_msgs          (Folder         *folder,
 225                                          FolderItem     *dest,
 226                                          MsgInfoList    *msglist,
 227                                          GHashTable     *relation);
 228
 229 static gint     search_msgs             (Folder                 *folder,
 230                                          FolderItem             *container,
 231                                          MsgNumberList          **msgs,
 232                                          gboolean               *on_server,
 233                                          MatcherList            *predicate,
 234                                          SearchProgressNotify   progress_cb,
 235                                          gpointer               progress_data);
 236
 237 static gint     imap_remove_msg         (Folder         *folder,
 238                                          FolderItem     *item,
 239                                          gint            uid);
 240 static gint     imap_remove_msgs        (Folder         *folder,
 241                                          FolderItem     *dest,
 242                                          MsgInfoList    *msglist,
 243                                          GHashTable     *relation);
 244 static gint     imap_expunge            (Folder         *folder,
 245                                          FolderItem     *dest);
 246 static gint     imap_remove_all_msg     (Folder         *folder,
 247                                          FolderItem     *item);
 248
 249 static gboolean imap_is_msg_changed     (Folder         *folder,
 250                                          FolderItem     *item,
 251                                          MsgInfo        *msginfo);
 252
 253 static gint     imap_close              (Folder         *folder,
 254                                          FolderItem     *item);
 255
 256 static gint     imap_scan_tree          (Folder         *folder);
 257
 258 static gint     imap_create_tree        (Folder         *folder);
 259
 260 static FolderItem *imap_create_folder   (Folder         *folder,
 261                                          FolderItem     *parent,
 262                                          const gchar    *name);
 263 static gint     imap_rename_folder      (Folder         *folder,
 264                                          FolderItem     *item,
 265                                          const gchar    *name);
 266 static gint     imap_remove_folder      (Folder         *folder,
 267                                          FolderItem     *item);
 268
 269 static FolderItem *imap_folder_item_new (Folder         *folder);
 270 static void imap_folder_item_destroy    (Folder         *folder,
 271                                          FolderItem     *item);
 272
 273 static IMAPSession *imap_session_get    (Folder         *folder);
 274
 275 static gint imap_auth                   (IMAPSession    *session,
 276                                          const gchar    *user,
 277                                          const gchar    *pass,
 278                                          IMAPAuthType    type);
 279
 280 static gint imap_scan_tree_recursive    (IMAPSession    *session,
 281                                          FolderItem     *item,
 282                                          gboolean        subs_only);
 283
 284 static void imap_create_missing_folders (Folder         *folder);
 285 static FolderItem *imap_create_special_folder
 286                                         (Folder                 *folder,
 287                                          SpecialFolderItemType   stype,
 288                                          const gchar            *name);
 289
 290 static gint imap_do_copy_msgs           (Folder         *folder,
 291                                          FolderItem     *dest,
 292                                          MsgInfoList    *msglist,
 293                                          GHashTable     *relation,
 294                                          gboolean        same_dest_ok);
 295
 296 static gint imap_do_remove_msgs         (Folder         *folder,
 297                                          FolderItem     *dest,
 298                                          MsgInfoList    *msglist,
 299                                          GHashTable     *relation);
 300
 301 static void imap_delete_all_cached_messages     (FolderItem     *item);
 302 static void imap_set_batch              (Folder         *folder,
 303                                          FolderItem     *item,
 304                                          gboolean        batch);
 305 static gint imap_set_message_flags      (IMAPSession    *session,
 306                                          IMAPFolderItem *item,
 307                                          MsgNumberList  *numlist,
 308                                          IMAPFlags       flags,
 309                                          GSList         *tags,
 310                                          gboolean        is_set);
 311 static gint imap_select                 (IMAPSession    *session,
 312                                          IMAPFolder     *folder,
 313                                          FolderItem     *item,
 314                                          gint           *exists,
 315                                          gint           *recent,
 316                                          gint           *unseen,
 317                                          guint32        *uid_validity,
 318                                          gint           *can_create_flags,
 319                                          gboolean        block);
 320 static gint imap_status                 (IMAPSession    *session,
 321                                          IMAPFolder     *folder,
 322                                          const gchar    *path,
 323                                          IMAPFolderItem *item,
 324                                          gint           *messages,
 325                                          guint32        *uid_next,
 326                                          guint32        *uid_validity,
 327                                          gint           *unseen,
 328                                          gboolean        block);
 329 static void     imap_commit_tags        (FolderItem     *item,
 330                                          MsgInfo        *msginfo,
 331                                          GSList         *set_tags,
 332                                          GSList         *unset_tags);
 333
 334 static gchar imap_get_path_separator            (IMAPSession    *session,
 335                                                  IMAPFolder     *folder,
 336                                                  const gchar    *path,
 337                                                  gint           *ok);
 338 static gchar *imap_get_real_path                (IMAPSession    *session,
 339                                                  IMAPFolder     *folder,
 340                                                  const gchar    *path,
 341                                                  gint           *ok);
 342 #ifdef HAVE_LIBETPAN
 343 static void imap_synchronise            (FolderItem     *item, gint days);
 344 #endif
 345 static gboolean imap_is_busy            (Folder *folder);
 346
 347 static void imap_free_capabilities      (IMAPSession    *session);
 348
 349 /* low-level IMAP4rev1 commands */
 350 static gint imap_cmd_login      (IMAPSession    *session,
 351                                  const gchar    *user,
 352                                  const gchar    *pass,
 353                                  const gchar    *type);
 354 static gint imap_cmd_noop       (IMAPSession    *session);
 355 #ifdef USE_GNUTLS
 356 static gint imap_cmd_starttls   (IMAPSession    *session);
 357 #endif
 358 static gint imap_cmd_select     (IMAPSession    *session,
 359                                  const gchar    *folder,
 360                                  gint           *exists,
 361                                  gint           *recent,
 362                                  gint           *unseen,
 363                                  guint32        *uid_validity,
 364                                  gint           *can_create_flags,
 365                                  GSList         **ok_flags,
 366                                  gboolean        block);
 367 static gint imap_cmd_close      (IMAPSession    *session);
 368 static gint imap_cmd_examine    (IMAPSession    *session,
 369                                  const gchar    *folder,
 370                                  gint           *exists,
 371                                  gint           *recent,
 372                                  gint           *unseen,
 373                                  guint32        *uid_validity,
 374                                  gboolean        block);
 375 static gint imap_cmd_create     (IMAPSession    *sock,
 376                                  const gchar    *folder);
 377 static gint imap_cmd_rename     (IMAPSession    *sock,
 378                                  const gchar    *oldfolder,
 379                                  const gchar    *newfolder);
 380 static gint imap_cmd_delete     (IMAPSession    *session,
 381                                  const gchar    *folder);
 382 static gint imap_cmd_fetch      (IMAPSession    *sock,
 383                                  guint32         uid,
 384                                  const gchar    *filename,
 385                                  gboolean        headers,
 386                                  gboolean        body);
 387 static gint imap_cmd_append     (IMAPSession    *session,
 388                                  IMAPFolderItem *item,
 389                                  const gchar    *destfolder,
 390                                  const gchar    *file,
 391                                  IMAPFlags       flags,
 392                                  guint32        *new_uid);
 393 static gint imap_cmd_copy       (IMAPSession *session,
 394                                  struct mailimap_set * set,
 395                                  const gchar *destfolder,
 396                                  struct mailimap_set ** source,
 397                                  struct mailimap_set ** dest);
 398 static gint imap_cmd_store      (IMAPSession    *session,
 399                                  IMAPFolderItem *item,
 400                                  struct mailimap_set * set,
 401                                  IMAPFlags flags,
 402                                  GSList *tags,
 403                                  int do_add);
 404 static gint imap_cmd_expunge    (IMAPSession    *session, gboolean force);
 405
 406 static void imap_path_separator_subst           (gchar          *str,
 407                                                  gchar           separator);
 408
 409 static gboolean imap_rename_folder_func         (GNode          *node,
 410                                                  gpointer        data);
 411 static gint imap_get_num_list                   (Folder         *folder,
 412                                                  FolderItem     *item,
 413                                                  GSList        **list,
 414                                                  gboolean       *old_uids_valid);
 415 static GSList *imap_get_msginfos                (Folder         *folder,
 416                                                  FolderItem     *item,
 417                                                  GSList         *msgnum_list);
 418 static MsgInfo *imap_get_msginfo                (Folder         *folder,
 419                                                  FolderItem     *item,
 420                                                  gint            num);
 421 static gboolean imap_scan_required              (Folder         *folder,
 422                                                  FolderItem     *item);
 423 static void imap_change_flags                   (Folder         *folder,
 424                                                  FolderItem     *item,
 425                                                  MsgInfo        *msginfo,
 426                                                  MsgPermFlags    newflags);
 427 static gint imap_get_flags                      (Folder         *folder,
 428                                                  FolderItem     *item,
 429                                                  MsgInfoList    *msglist,
 430                                                  GHashTable     *msgflags);
 431 static gchar *imap_folder_get_path              (Folder         *folder);
 432 static gchar *imap_item_get_path                (Folder         *folder,
 433                                                  FolderItem     *item);
 434 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item);
 435
 436
 437 /* data types conversion libetpan <-> claws */
 438 static GSList * imap_list_from_lep(IMAPFolder * folder,
 439                                    clist * list, const gchar * real_path, gboolean all);
 440 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist);
 441 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist);
 442 static GSList * imap_uid_list_from_lep(clist * list, gint* length);
 443 static GSList * imap_uid_list_from_lep_tab(carray * list);
 444 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
 445                                                    GHashTable * hash,
 446                                                    GHashTable *tags_hash);
 447 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
 448                                        FolderItem *item);
 449 static void imap_lep_set_free(GSList *seq_list);
 450 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags);
 451
 452 typedef struct _hashtable_data {
 453         GSList *msglist;
 454         IMAPFolderItem *item;
 455 } hashtable_data;
 456
 457 static FolderClass imap_class;
 458
 459 FolderClass *imap_get_class(void)
 460 {
 461         if (imap_class.idstr == NULL) {
 462                 imap_class.type = F_IMAP;
 463                 imap_class.idstr = "imap";
 464                 imap_class.uistr = "IMAP4";
 465                 imap_class.supports_server_search = TRUE;
 466
 467                 /* Folder functions */
 468                 imap_class.new_folder = imap_folder_new;
 469                 imap_class.destroy_folder = imap_folder_destroy;
 470                 imap_class.scan_tree = imap_scan_tree;
 471                 imap_class.create_tree = imap_create_tree;
 472
 473                 /* FolderItem functions */
 474                 imap_class.item_new = imap_folder_item_new;
 475                 imap_class.item_destroy = imap_folder_item_destroy;
 476                 imap_class.item_get_path = imap_item_get_path;
 477                 imap_class.create_folder = imap_create_folder;
 478                 imap_class.rename_folder = imap_rename_folder;
 479                 imap_class.remove_folder = imap_remove_folder;
 480                 imap_class.close = imap_close;
 481                 imap_class.get_num_list = imap_get_num_list;
 482                 imap_class.scan_required = imap_scan_required;
 483                 imap_class.set_xml = folder_set_xml;
 484                 imap_class.get_xml = folder_get_xml;
 485                 imap_class.item_set_xml = imap_item_set_xml;
 486                 imap_class.item_get_xml = imap_item_get_xml;
 487
 488                 /* Message functions */
 489                 imap_class.get_msginfo = imap_get_msginfo;
 490                 imap_class.get_msginfos = imap_get_msginfos;
 491                 imap_class.fetch_msg = imap_fetch_msg;
 492                 imap_class.fetch_msg_full = imap_fetch_msg_full;
 493                 imap_class.add_msg = imap_add_msg;
 494                 imap_class.add_msgs = imap_add_msgs;
 495                 imap_class.copy_msg = imap_copy_msg;
 496                 imap_class.copy_msgs = imap_copy_msgs;
 497                 imap_class.search_msgs = search_msgs;
 498                 imap_class.remove_msg = imap_remove_msg;
 499                 imap_class.remove_msgs = imap_remove_msgs;
 500                 imap_class.expunge = imap_expunge;
 501                 imap_class.remove_all_msg = imap_remove_all_msg;
 502                 imap_class.is_msg_changed = imap_is_msg_changed;
 503                 imap_class.change_flags = imap_change_flags;
 504                 imap_class.get_flags = imap_get_flags;
 505                 imap_class.set_batch = imap_set_batch;
 506                 imap_class.synchronise = imap_synchronise;
 507                 imap_class.remove_cached_msg = imap_remove_cached_msg;
 508                 imap_class.commit_tags = imap_commit_tags;
 509 #ifdef USE_PTREAD
 510                 pthread_mutex_init(&imap_mutex, NULL);
 511 #endif
 512         }
 513
 514         return &imap_class;
 515 }
 516
 517 static void imap_refresh_sensitivity (IMAPSession *session)
 518 {
 519         MainWindow *mainwin;
 520
 521         if (session->sens_update_block)
 522                 return;
 523         mainwin = mainwindow_get_mainwindow();
 524         if (mainwin) {
 525                 toolbar_main_set_sensitive(mainwin);
 526                 main_window_set_menu_sensitive(mainwin);
 527         }
 528 }
 529
 530 static void lock_session(IMAPSession *session)
 531 {
 532         if (session) {
 533                 debug_print("locking session %p (%d)\n", session, session->busy);
 534                 if (session->busy)
 535                         debug_print("         SESSION WAS LOCKED !!      \n");
 536                 session->busy = TRUE;
 537                 imap_refresh_sensitivity(session);
 538         } else {
 539                 debug_print("can't lock null session\n");
 540         }
 541 }
 542
 543 static void unlock_session(IMAPSession *session)
 544 {
 545         if (session) {
 546                 debug_print("unlocking session %p\n", session);
 547                 session->busy = FALSE;
 548                 imap_refresh_sensitivity(session);
 549         } else {
 550                 debug_print("can't unlock null session\n");
 551         }
 552 }
 553
 554 static gboolean imap_ping(gpointer data)
 555 {
 556         Session *session = (Session *)data;
 557         IMAPSession *imap_session = IMAP_SESSION(session);
 558         int r;
 559
 560         if (session->state != SESSION_READY)
 561                 return FALSE;
 562         if (imap_session->busy || !imap_session->authenticated)
 563                 return TRUE;
 564
 565         lock_session(imap_session);
 566         r = imap_cmd_noop(imap_session);
 567         unlock_session(imap_session);
 568
 569         return r == MAILIMAP_NO_ERROR;
 570 }
 571
 572 static void imap_disc_session_destroy(IMAPSession *session)
 573 {
 574         RemoteFolder *rfolder = NULL;
 575
 576         if (session == NULL)
 577                 return;
 578
 579         rfolder = REMOTE_FOLDER(IMAP_SESSION(session)->folder);
 580
 581         if (rfolder == NULL)
 582                 return;
 583         log_warning(LOG_PROTOCOL, _("IMAP4 connection broken\n"));
 584         SESSION(session)->state = SESSION_DISCONNECTED;
 585         SESSION(session)->sock = NULL;
 586 }
 587
 588 static void imap_safe_destroy(IMAPSession *session)
 589 {
 590         if (!session->busy)
 591                 session_destroy(SESSION(session));
 592         else
 593                 session->do_destroy = TRUE;
 594 }
 595
 596 static gboolean is_fatal(int libetpan_errcode)
 597 {
 598         switch(libetpan_errcode) {
 599         case MAILIMAP_ERROR_STREAM:
 600         case MAILIMAP_ERROR_PROTOCOL:
 601         case MAILIMAP_ERROR_PARSE:
 602         case MAILIMAP_ERROR_BAD_STATE:
 603                 return TRUE;
 604         default:
 605                 return FALSE;
 606         }
 607 }
 608
 609 static void imap_handle_error(Session *session, const gchar *server, int libetpan_errcode)
 610 {
 611         const gchar *session_server = (session ? session->server : NULL);
 612
 613         if (session_server == NULL)
 614                 session_server = server;
 615         if (session_server == NULL)
 616                 session_server = "(null)";
 617
 618         switch(libetpan_errcode) {
 619         case MAILIMAP_NO_ERROR:
 620                 return;
 621         case MAILIMAP_NO_ERROR_AUTHENTICATED:
 622                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: authenticated\n"), session_server);
 623                 break;
 624         case MAILIMAP_NO_ERROR_NON_AUTHENTICATED:
 625                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: not authenticated\n"), session_server);
 626                 break;
 627         case MAILIMAP_ERROR_BAD_STATE:
 628                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: bad state\n"), session_server);
 629                 break;
 630         case MAILIMAP_ERROR_STREAM:
 631                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: stream error\n"), session_server);
 632                 break;
 633         case MAILIMAP_ERROR_PARSE:
 634                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: parse error "
 635                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 636                 break;
 637         case MAILIMAP_ERROR_CONNECTION_REFUSED:
 638                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection refused\n"), session_server);
 639                 break;
 640         case MAILIMAP_ERROR_MEMORY:
 641                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: memory error\n"), session_server);
 642                 break;
 643         case MAILIMAP_ERROR_FATAL:
 644                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: fatal error\n"), session_server);
 645                 break;
 646         case MAILIMAP_ERROR_PROTOCOL:
 647                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: protocol error"
 648                                             "(very probably non-RFC compliance from the server)\n"), session_server);
 649                 break;
 650         case MAILIMAP_ERROR_DONT_ACCEPT_CONNECTION:
 651                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: connection not accepted\n"), session_server);
 652                 break;
 653         case MAILIMAP_ERROR_APPEND:
 654                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: APPEND error\n"), session_server);
 655                 break;
 656         case MAILIMAP_ERROR_NOOP:
 657                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: NOOP error\n"), session_server);
 658                 break;
 659         case MAILIMAP_ERROR_LOGOUT:
 660                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGOUT error\n"), session_server);
 661                 break;
 662         case MAILIMAP_ERROR_CAPABILITY:
 663                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CAPABILITY error\n"), session_server);
 664                 break;
 665         case MAILIMAP_ERROR_CHECK:
 666                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CHECK error\n"), session_server);
 667                 break;
 668         case MAILIMAP_ERROR_CLOSE:
 669                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CLOSE error\n"), session_server);
 670                 break;
 671         case MAILIMAP_ERROR_EXPUNGE:
 672                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXPUNGE error\n"), session_server);
 673                 break;
 674         case MAILIMAP_ERROR_COPY:
 675                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: COPY error\n"), session_server);
 676                 break;
 677         case MAILIMAP_ERROR_UID_COPY:
 678                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID COPY error\n"), session_server);
 679                 break;
 680         case MAILIMAP_ERROR_CREATE:
 681                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: CREATE error\n"), session_server);
 682                 break;
 683         case MAILIMAP_ERROR_DELETE:
 684                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: DELETE error\n"), session_server);
 685                 break;
 686         case MAILIMAP_ERROR_EXAMINE:
 687                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXAMINE error\n"), session_server);
 688                 break;
 689         case MAILIMAP_ERROR_FETCH:
 690                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: FETCH error\n"), session_server);
 691                 break;
 692         case MAILIMAP_ERROR_UID_FETCH:
 693                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID FETCH error\n"), session_server);
 694                 break;
 695         case MAILIMAP_ERROR_LIST:
 696                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LIST error\n"), session_server);
 697                 break;
 698         case MAILIMAP_ERROR_LOGIN:
 699                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LOGIN error\n"), session_server);
 700                 break;
 701         case MAILIMAP_ERROR_LSUB:
 702                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: LSUB error\n"), session_server);
 703                 break;
 704         case MAILIMAP_ERROR_RENAME:
 705                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: RENAME error\n"), session_server);
 706                 break;
 707         case MAILIMAP_ERROR_SEARCH:
 708                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SEARCH error\n"), session_server);
 709                 break;
 710         case MAILIMAP_ERROR_UID_SEARCH:
 711                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID SEARCH error\n"), session_server);
 712                 break;
 713         case MAILIMAP_ERROR_SELECT:
 714                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SELECT error\n"), session_server);
 715                 break;
 716         case MAILIMAP_ERROR_STATUS:
 717                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STATUS error\n"), session_server);
 718                 break;
 719         case MAILIMAP_ERROR_STORE:
 720                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STORE error\n"), session_server);
 721                 break;
 722         case MAILIMAP_ERROR_UID_STORE:
 723                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UID STORE error\n"), session_server);
 724                 break;
 725         case MAILIMAP_ERROR_SUBSCRIBE:
 726                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SUBSCRIBE error\n"), session_server);
 727                 break;
 728         case MAILIMAP_ERROR_UNSUBSCRIBE:
 729                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: UNSUBSCRIBE error\n"), session_server);
 730                 break;
 731         case MAILIMAP_ERROR_STARTTLS:
 732                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: STARTTLS error\n"), session_server);
 733                 break;
 734         case MAILIMAP_ERROR_INVAL:
 735                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: INVAL error\n"), session_server);
 736                 break;
 737         case MAILIMAP_ERROR_EXTENSION:
 738                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: EXTENSION error\n"), session_server);
 739                 break;
 740         case MAILIMAP_ERROR_SASL:
 741                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SASL error\n"), session_server);
 742                 break;
 743 #ifdef USE_GNUTLS
 744         case MAILIMAP_ERROR_SSL:
 745                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: SSL error\n"), session_server);
 746                 break;
 747 #endif
 748         default:
 749                 log_warning(LOG_PROTOCOL, _("IMAP error on %s: Unknown error [%d]\n"),
 750                         session_server, libetpan_errcode);
 751                 break;
 752         }
 753
 754         if (session && is_fatal(libetpan_errcode)) {
 755                 imap_disc_session_destroy(IMAP_SESSION(session));
 756         } else if (session && !is_fatal(libetpan_errcode)) {
 757                 if (IMAP_SESSION(session)->busy)
 758                         unlock_session(IMAP_SESSION(session));
 759         }
 760 }
 761
 762 static Folder *imap_folder_new(const gchar *name, const gchar *path)
 763 {
 764         Folder *folder;
 765
 766         folder = (Folder *)g_new0(IMAPFolder, 1);
 767         folder->klass = &imap_class;
 768         imap_folder_init(folder, name, path);
 769
 770         return folder;
 771 }
 772
 773 static void imap_folder_destroy(Folder *folder)
 774 {
 775         while (imap_folder_get_refcnt(folder) > 0)
 776                 gtk_main_iteration();
 777
 778         g_free(IMAP_FOLDER(folder)->search_charset);
 779
 780         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 781         imap_done(folder);
 782 }
 783
 784 static void imap_folder_init(Folder *folder, const gchar *name,
 785                              const gchar *path)
 786 {
 787         folder_remote_folder_init((Folder *)folder, name, path);
 788         IMAP_FOLDER(folder)->max_set_size = IMAP_SET_MAX_COUNT;
 789         IMAP_FOLDER(folder)->search_charset_supported = TRUE;
 790         IMAP_FOLDER(folder)->search_charset = g_strdup(conv_get_locale_charset_str_no_utf8());
 791 }
 792
 793 static FolderItem *imap_folder_item_new(Folder *folder)
 794 {
 795         IMAPFolderItem *item;
 796
 797         item = g_new0(IMAPFolderItem, 1);
 798         item->lastuid = 0;
 799         item->uid_next = 0;
 800         item->uid_list = NULL;
 801
 802         return (FolderItem *)item;
 803 }
 804
 805 static void imap_folder_item_destroy(Folder *folder, FolderItem *_item)
 806 {
 807         IMAPFolderItem *item = (IMAPFolderItem *)_item;
 808
 809         g_return_if_fail(item != NULL);
 810         g_slist_free(item->uid_list);
 811
 812         g_free(_item);
 813 }
 814
 815 static gboolean imap_reset_uid_lists_func(GNode *node, gpointer data)
 816 {
 817         IMAPFolderItem *item = (IMAPFolderItem *)node->data;
 818
 819         item->lastuid = 0;
 820         g_slist_free(item->uid_list);
 821         item->uid_list = NULL;
 822
 823         return FALSE;
 824 }
 825
 826 static void imap_reset_uid_lists(Folder *folder)
 827 {
 828         if(folder->node == NULL)
 829                 return;
 830
 831         /* Destroy all uid lists and rest last uid */
 832         g_node_traverse(folder->node, G_IN_ORDER, G_TRAVERSE_ALL, -1, imap_reset_uid_lists_func, NULL);
 833 }
 834
 835 static int imap_get_capabilities(IMAPSession *session)
 836 {
 837         struct mailimap_capability_data *capabilities = NULL;
 838         clistiter *cur;
 839         int result = -1;
 840
 841         if (session->capability != NULL)
 842                 return MAILIMAP_NO_ERROR;
 843
 844         capabilities = imap_threaded_capability(session->folder, &result);
 845
 846         if (result != MAILIMAP_NO_ERROR) {
 847                 return result;
 848         }
 849
 850         if (capabilities == NULL || capabilities->cap_list == NULL) {
 851                 return MAILIMAP_NO_ERROR;
 852         }
 853
 854         for(cur = clist_begin(capabilities->cap_list) ; cur != NULL ;
 855             cur = clist_next(cur)) {
 856                 struct mailimap_capability * cap =
 857                         clist_content(cur);
 858                 if (!cap || cap->cap_data.cap_name == NULL)
 859                         continue;
 860                 session->capability = g_slist_append
 861                                 (session->capability,
 862                                  g_strdup(cap->cap_data.cap_name));
 863                 debug_print("got capa %s\n", cap->cap_data.cap_name);
 864         }
 865         mailimap_capability_data_free(capabilities);
 866         return MAILIMAP_NO_ERROR;
 867 }
 868
 869 static gboolean imap_has_capability(IMAPSession *session, const gchar *cap)
 870 {
 871         GSList *cur;
 872         for (cur = session->capability; cur; cur = cur->next) {
 873                 if (!g_ascii_strcasecmp(cur->data, cap))
 874                         return TRUE;
 875         }
 876         return FALSE;
 877 }
 878
 879 static gint imap_auth(IMAPSession *session, const gchar *user, const gchar *pass,
 880                       IMAPAuthType type)
 881 {
 882         gint ok = MAILIMAP_ERROR_LOGIN;
 883         static time_t last_login_err = 0;
 884         gchar *ext_info = "";
 885         int r;
 886         gchar *server = NULL;
 887         if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
 888                 imap_handle_error(SESSION(session), NULL, r);
 889                 return r;
 890         }
 891         server = g_strdup(SESSION(session)->server);
 892         switch(type) {
 893         case IMAP_AUTH_ANON:
 894                 ok = imap_cmd_login(session, user, pass, "ANONYMOUS");
 895                 break;
 896         case IMAP_AUTH_CRAM_MD5:
 897                 ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 898                 break;
 899         case IMAP_AUTH_DIGEST_MD5:
 900                 ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 901                 break;
 902         case IMAP_AUTH_LOGIN:
 903                 ok = imap_cmd_login(session, user, pass, "LOGIN");
 904                 break;
 905         case IMAP_AUTH_GSSAPI:
 906                 ok = imap_cmd_login(session, user, pass, "GSSAPI");
 907                 break;
 908         default:
 909                 debug_print("capabilities:\n"
 910                                 "\t ANONYMOUS %d\n"
 911                                 "\t CRAM-MD5 %d\n"
 912                                 "\t DIGEST-MD5 %d\n"
 913                                 "\t LOGIN %d\n"
 914                                 "\t GSSAPI %d\n",
 915                         imap_has_capability(session, "ANONYMOUS"),
 916                         imap_has_capability(session, "CRAM-MD5"),
 917                         imap_has_capability(session, "DIGEST-MD5"),
 918                         imap_has_capability(session, "LOGIN"),
 919                         imap_has_capability(session, "GSSAPI"));
 920                 if (imap_has_capability(session, "CRAM-MD5"))
 921                         ok = imap_cmd_login(session, user, pass, "CRAM-MD5");
 922                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "DIGEST-MD5"))
 923                         ok = imap_cmd_login(session, user, pass, "DIGEST-MD5");
 924                 if (ok == MAILIMAP_ERROR_LOGIN && imap_has_capability(session, "GSSAPI"))
 925                         ok = imap_cmd_login(session, user, pass, "GSSAPI");
 926                 if (ok == MAILIMAP_ERROR_LOGIN) /* we always try LOGIN before giving up */
 927                         ok = imap_cmd_login(session, user, pass, "LOGIN");
 928         }
 929
 930         if (ok == MAILIMAP_NO_ERROR)
 931                 session->authenticated = TRUE;
 932         else {
 933                 if (type == IMAP_AUTH_CRAM_MD5) {
 934                         ext_info = _("\n\nCRAM-MD5 logins only work if libetpan has been "
 935                                      "compiled with SASL support and the "
 936                                      "CRAM-MD5 SASL plugin is installed.");
 937                 }
 938
 939                 if (type == IMAP_AUTH_DIGEST_MD5) {
 940                         ext_info = _("\n\nDIGEST-MD5 logins only work if libetpan has been "
 941                                      "compiled with SASL support and the "
 942                                      "DIGEST-MD5 SASL plugin is installed.");
 943                 }
 944
 945                 if (time(NULL) - last_login_err > 10) {
 946                         if (!prefs_common.no_recv_err_panel) {
 947                                 alertpanel_error_log(_("Connection to %s failed: "
 948                                         "login refused.%s"),
 949                                         server, ext_info);
 950                         } else {
 951                                 log_error(LOG_PROTOCOL, _("Connection to %s failed: "
 952                                         "login refused.%s\n"),
 953                                         server, ext_info);
 954                         }
 955                 }
 956                 last_login_err = time(NULL);
 957         }
 958         g_free(server);
 959         return ok;
 960 }
 961
 962 static IMAPSession *imap_reconnect_if_possible(Folder *folder, IMAPSession *session)
 963 {
 964         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 965         /* Check if this is the first try to establish a
 966            connection, if yes we don't try to reconnect */
 967         debug_print("reconnecting\n");
 968         if (rfolder->session == NULL) {
 969                 log_warning(LOG_PROTOCOL, _("Connecting to %s failed"),
 970                             folder->account->recv_server);
 971                 SESSION(session)->sock = NULL;
 972                 imap_safe_destroy(session);
 973                 session = NULL;
 974         } else {
 975                 rfolder->session = NULL;
 976                 log_warning(LOG_PROTOCOL, _("IMAP4 connection to %s has been"
 977                             " disconnected. Reconnecting...\n"),
 978                             folder->account->recv_server);
 979                 statusbar_print_all(_("IMAP4 connection to %s has been"
 980                             " disconnected. Reconnecting...\n"),
 981                             folder->account->recv_server);
 982                 SESSION(session)->state = SESSION_DISCONNECTED;
 983                 SESSION(session)->sock = NULL;
 984                 imap_safe_destroy(session);
 985                 /* Clear folders session to make imap_session_get create
 986                    a new session, because of rfolder->session == NULL
 987                    it will not try to reconnect again and so avoid an
 988                    endless loop */
 989                 debug_print("getting session...\n");
 990                 session = imap_session_get(folder);
 991                 rfolder->session = SESSION(session);
 992                 statusbar_pop_all();
 993         }
 994         return session;
 995 }
 996
 997 static IMAPSession *imap_session_get(Folder *folder)
 998 {
 999         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
1000         IMAPSession *session = NULL;
1001         gint r = MAILIMAP_NO_ERROR;
1002
1003         g_return_val_if_fail(folder != NULL, NULL);
1004         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, NULL);
1005         g_return_val_if_fail(folder->account != NULL, NULL);
1006
1007         if (prefs_common.work_offline &&
1008             !inc_offline_should_override(FALSE,
1009                 _("Claws Mail needs network access in order "
1010                   "to access the IMAP server."))) {
1011                 return NULL;
1012         }
1013
1014         /* check for deferred destroy */
1015         if (rfolder->session != NULL) {
1016                 session = IMAP_SESSION(rfolder->session);
1017                 if (!session->busy && session->do_destroy) {
1018                         rfolder->session = NULL;
1019                         imap_safe_destroy(session);
1020                         session = NULL;
1021                 }
1022         }
1023
1024         /* Make sure we have a session */
1025         if (rfolder->session != NULL && rfolder->session->state != SESSION_DISCONNECTED) {
1026                 session = IMAP_SESSION(rfolder->session);
1027         } else if (rfolder->session != NULL && rfolder->session->state == SESSION_DISCONNECTED) {
1028                 imap_safe_destroy(IMAP_SESSION(rfolder->session));
1029                 rfolder->session = NULL;
1030                 goto new_conn;
1031         } else if (rfolder->connecting) {
1032                 debug_print("already connecting\n");
1033                 return NULL;
1034         } else {
1035 new_conn:
1036                 imap_reset_uid_lists(folder);
1037                 if (time(NULL) - rfolder->last_failure <= 2)
1038                         return NULL;
1039                 rfolder->connecting = TRUE;
1040                 session = imap_session_new(folder, folder->account);
1041         }
1042         if(session == NULL) {
1043                 rfolder->last_failure = time(NULL);
1044                 rfolder->connecting = FALSE;
1045                 return NULL;
1046         }
1047
1048         /* Make sure session is authenticated */
1049         if (!IMAP_SESSION(session)->authenticated)
1050                 r = imap_session_authenticate(IMAP_SESSION(session), folder->account);
1051
1052         if (r != MAILIMAP_NO_ERROR || (!is_fatal(r) && !IMAP_SESSION(session)->authenticated)) {
1053                 rfolder->session = NULL;
1054                 if (!is_fatal(r)) {
1055                         imap_threaded_disconnect(session->folder);
1056                 }
1057                 SESSION(session)->state = SESSION_DISCONNECTED;
1058                 SESSION(session)->sock = NULL;
1059                 imap_safe_destroy(session);
1060                 rfolder->last_failure = time(NULL);
1061                 rfolder->connecting = FALSE;
1062                 return NULL;
1063         }
1064
1065         /* I think the point of this code is to avoid sending a
1066          * keepalive if we've used the session recently and therefore
1067          * think it's still alive.  Unfortunately, most of the code
1068          * does not yet check for errors on the socket, and so if the
1069          * connection drops we don't notice until the timeout expires.
1070          * A better solution than sending a NOOP every time would be
1071          * for every command to be prepared to retry until it is
1072          * successfully sent. -- mbp */
1073         if ((time(NULL) - SESSION(session)->last_access_time > SESSION_TIMEOUT_INTERVAL) || session->cancelled) {
1074                 /* verify that the session is still alive */
1075                 r = imap_cmd_noop(session);
1076
1077                 if (r != MAILIMAP_NO_ERROR) {
1078                         debug_print("disconnected!\n");
1079                         if (!is_fatal(r))
1080                                 session = imap_reconnect_if_possible(folder, session);
1081                         else {
1082                                 rfolder->session = NULL;
1083                                 rfolder->connecting = FALSE;
1084                                 SESSION(session)->state = SESSION_DISCONNECTED;
1085                                 SESSION(session)->sock = NULL;
1086                                 imap_safe_destroy(session);
1087                                 session = imap_session_get(folder);
1088                         }
1089                 }
1090                 if (session)
1091                         session->cancelled = FALSE;
1092         }
1093
1094         rfolder->session = SESSION(session);
1095         rfolder->connecting = FALSE;
1096
1097         return IMAP_SESSION(session);
1098 }
1099
1100 static IMAPSession *imap_session_new(Folder * folder,
1101                                      const PrefsAccount *account)
1102 {
1103         IMAPSession *session;
1104         gushort port;
1105         int r;
1106         int authenticated = FALSE;
1107         gchar *buf;
1108
1109 #ifdef USE_GNUTLS
1110         /* FIXME: IMAP over SSL only... */
1111         SSLType ssl_type;
1112
1113         port = account->set_imapport ? account->imapport
1114                 : account->ssl_imap == SSL_TUNNEL ? IMAPS_PORT : IMAP4_PORT;
1115         ssl_type = account->ssl_imap;
1116 #else
1117         if (account->ssl_imap != SSL_NONE) {
1118                 if (alertpanel_full(_("Insecure connection"),
1119                         _("This connection is configured to be secured "
1120                           "using SSL, but SSL is not available in this "
1121                           "build of Claws Mail. \n\n"
1122                           "Do you want to continue connecting to this "
1123                           "server? The communication would not be "
1124                           "secure."),
1125                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
1126                           NULL, FALSE, NULL, ALERT_WARNING,
1127                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
1128                         return NULL;
1129         }
1130         port = account->set_imapport ? account->imapport
1131                 : IMAP4_PORT;
1132 #endif
1133
1134         imap_init(folder);
1135         buf = g_strdup_printf(_("Account '%s': Connecting to IMAP4 server: %s:%d..."),
1136                                 folder->account->account_name, folder->account->recv_server,
1137                                 port);
1138         statuswindow_print_all("%s", buf);
1139         log_message(LOG_PROTOCOL, "%s\n", buf);
1140         g_free(buf);
1141
1142 #ifndef G_OS_WIN32
1143         if (account->set_tunnelcmd) {
1144                 r = imap_threaded_connect_cmd(folder,
1145                                               account->tunnelcmd,
1146                                               account->recv_server,
1147                                               port);
1148         }
1149         else
1150 #endif
1151         {
1152 #ifdef USE_GNUTLS
1153                 if (ssl_type == SSL_TUNNEL) {
1154                         r = imap_threaded_connect_ssl(folder,
1155                                                       account->recv_server,
1156                                                       port);
1157                 }
1158                 else
1159 #endif
1160                 {
1161                         r = imap_threaded_connect(folder,
1162                                                   account->recv_server,
1163                                                   port);
1164                 }
1165         }
1166
1167         statuswindow_pop_all();
1168         if (r == MAILIMAP_NO_ERROR_AUTHENTICATED) {
1169                 authenticated = TRUE;
1170         }
1171         else if (r == MAILIMAP_NO_ERROR_NON_AUTHENTICATED) {
1172                 authenticated = FALSE;
1173         }
1174         else {
1175 #ifdef USE_GNUTLS
1176                 if (r == MAILIMAP_ERROR_SSL)
1177                         log_error(LOG_PROTOCOL, _("SSL handshake failed\n"));
1178                 else
1179 #endif
1180                         imap_handle_error(NULL, account->recv_server, r);
1181
1182                 if(!prefs_common.no_recv_err_panel) {
1183                         alertpanel_error_log(_("Can't connect to IMAP4 server: %s:%d"),
1184                                          account->recv_server, port);
1185                 } else {
1186                         log_error(LOG_PROTOCOL, _("Can't connect to IMAP4 server: %s:%d\n"),
1187                                          account->recv_server, port);
1188                 }
1189
1190                 return NULL;
1191         }
1192
1193         session = g_new0(IMAPSession, 1);
1194         session_init(SESSION(session), account, FALSE);
1195         SESSION(session)->type             = SESSION_IMAP;
1196         SESSION(session)->server           = g_strdup(account->recv_server);
1197         SESSION(session)->port             = port;
1198         SESSION(session)->sock             = NULL;
1199
1200         SESSION(session)->destroy          = imap_session_destroy;
1201
1202         session->capability = NULL;
1203
1204         session->authenticated = authenticated;
1205         session->mbox = NULL;
1206         session->exists = 0;
1207         session->recent = 0;
1208         session->expunge = 0;
1209         session->cmd_count = 0;
1210         session->folder = folder;
1211         IMAP_FOLDER(session->folder)->last_seen_separator = 0;
1212
1213 #ifdef USE_GNUTLS
1214         if (account->ssl_imap == SSL_STARTTLS) {
1215                 gint ok;
1216
1217                 ok = imap_cmd_starttls(session);
1218                 if (ok != MAILIMAP_NO_ERROR) {
1219                         log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
1220                         if (!is_fatal(ok)) {
1221                                 SESSION(session)->sock = NULL;
1222                                 imap_safe_destroy(session);
1223                         }
1224                         return NULL;
1225                 }
1226
1227                 imap_free_capabilities(session);
1228                 session->authenticated = FALSE;
1229                 session->uidplus = FALSE;
1230                 session->cmd_count = 1;
1231         }
1232 #endif
1233         log_message(LOG_PROTOCOL, "IMAP connection is %s-authenticated\n",
1234                     (session->authenticated) ? "pre" : "un");
1235
1236         session_register_ping(SESSION(session), imap_ping);
1237
1238         return session;
1239 }
1240
1241 static gint imap_session_authenticate(IMAPSession *session,
1242                                       PrefsAccount *account)
1243 {
1244         gchar *pass, *acc_pass;
1245         gboolean failed = FALSE;
1246         gint ok = MAILIMAP_NO_ERROR;
1247         g_return_val_if_fail(account->userid != NULL, MAILIMAP_ERROR_BAD_STATE);
1248
1249         if (password_get(account->userid, account->recv_server, "imap",
1250                          SESSION(session)->port, &pass)) {
1251                 Xstrdup_a(acc_pass, pass, {g_free(pass); return MAILIMAP_NO_ERROR;});
1252                 g_free(pass);
1253         } else {
1254                 acc_pass = account->passwd;
1255         }
1256 try_again:
1257         pass = acc_pass;
1258         if (!pass && account->imap_auth_type != IMAP_AUTH_ANON && account->imap_auth_type != IMAP_AUTH_GSSAPI) {
1259                 gchar *tmp_pass;
1260                 tmp_pass = input_dialog_query_password_keep(account->recv_server,
1261                                                             account->userid,
1262                                                             &(account->session_passwd));
1263                 if (!tmp_pass)
1264                         return MAILIMAP_NO_ERROR;
1265                 Xstrdup_a(pass, tmp_pass, {g_free(tmp_pass); return MAILIMAP_NO_ERROR;});
1266                 g_free(tmp_pass);
1267         } else if (account->imap_auth_type == IMAP_AUTH_ANON || account->imap_auth_type == IMAP_AUTH_GSSAPI) {
1268                 pass = "";
1269         }
1270         if ((ok = imap_auth(session, account->userid, pass, account->imap_auth_type)) != MAILIMAP_NO_ERROR) {
1271
1272                 if (!failed && !is_fatal(ok)) {
1273                         acc_pass = NULL;
1274                         failed = TRUE;
1275                         if (account->session_passwd != NULL) {
1276                                 g_free(account->session_passwd);
1277                                 account->session_passwd = NULL;
1278                         }
1279                         goto try_again;
1280                 } else {
1281                         if (prefs_common.no_recv_err_panel) {
1282                                 log_error(LOG_PROTOCOL, _("Couldn't login to IMAP server %s.\n"), account->recv_server);
1283                                 mainwindow_show_error();
1284                         } else
1285                                 alertpanel_error_log(_("Couldn't login to IMAP server %s."), account->recv_server);
1286                 }
1287
1288                 return ok;
1289         }
1290
1291         statuswindow_pop_all();
1292         session->authenticated = TRUE;
1293         return MAILIMAP_NO_ERROR;
1294 }
1295
1296 static void imap_session_destroy(Session *session)
1297 {
1298         if (session->state != SESSION_DISCONNECTED)
1299                 imap_threaded_disconnect(IMAP_SESSION(session)->folder);
1300
1301         imap_free_capabilities(IMAP_SESSION(session));
1302         g_free(IMAP_SESSION(session)->mbox);
1303 }
1304
1305 static gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
1306 {
1307         return imap_fetch_msg_full(folder, item, uid, TRUE, TRUE);
1308 }
1309
1310 static guint get_file_size_with_crs(const gchar *filename)
1311 {
1312         FILE *fp = NULL;
1313         guint cnt = 0;
1314         gchar buf[4096];
1315
1316         if (filename == NULL)
1317                 return -1;
1318
1319         fp = g_fopen(filename, "rb");
1320         if (!fp)
1321                 return -1;
1322
1323         while (fgets(buf, sizeof (buf), fp) != NULL) {
1324                 cnt += strlen(buf);
1325                 if (!strstr(buf, "\r\n") && strstr(buf, "\n"))
1326                         cnt++;
1327         }
1328
1329         fclose(fp);
1330         return cnt;
1331 }
1332
1333 static gchar *imap_get_cached_filename(FolderItem *item, guint msgnum)
1334 {
1335         gchar *path, *filename;
1336
1337         cm_return_val_if_fail(item != NULL, NULL);
1338
1339         path = folder_item_get_path(item);
1340
1341         if (!is_dir_exist(path)) {
1342                 g_free(path);
1343                 return NULL;
1344         }
1345
1346         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
1347
1348         if (is_dir_exist(filename)) {
1349                 g_free(filename);
1350                 filename = g_strconcat(path, G_DIR_SEPARATOR_S, ".", itos(msgnum), NULL);
1351         }
1352         g_free(path);
1353
1354         return filename;
1355 }
1356
1357 static void imap_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
1358 {
1359         gchar *filename;
1360
1361         filename = imap_get_cached_filename(item, msginfo->msgnum);
1362
1363         cm_return_if_fail(filename != NULL);
1364
1365         if (is_file_exist(filename)) {
1366                 claws_unlink(filename);
1367         }
1368         g_free(filename);
1369 }
1370
1371 typedef struct _TagsData {
1372         gchar *str;
1373         GSList *msglist;
1374         IMAPFolderItem *item;
1375 } TagsData;
1376
1377 static void imap_commit_tags(FolderItem *item, MsgInfo *msginfo, GSList *tags_set, GSList *tags_unset)
1378 {
1379         IMAPSession *session;
1380         gint ok, can_create_tags;
1381         Folder *folder = NULL;
1382         TagsData *ht_data = NULL;
1383         GSList *cur;
1384
1385         g_return_if_fail(item != NULL);
1386         g_return_if_fail(msginfo != NULL);
1387
1388         folder = item->folder;
1389         debug_print("getting session...\n");
1390         session = imap_session_get(folder);
1391
1392         if (!session) {
1393                 debug_print("can't get session\n");
1394                 return;
1395         }
1396
1397         ok = imap_select(session, IMAP_FOLDER(folder), item,
1398                          NULL, NULL, NULL, NULL, &can_create_tags, FALSE);
1399
1400         if (ok != MAILIMAP_NO_ERROR) {
1401                 return;
1402         }
1403
1404
1405         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS)
1406                 return;
1407
1408         if (IMAP_FOLDER_ITEM(item)->batching) {
1409                 /* instead of performing an UID STORE command for each message change,
1410                  * as a lot of them can change "together", we just fill in hashtables
1411                  * and defer the treatment so that we're able to send only one
1412                  * command.
1413                  */
1414                 debug_print("IMAP batch mode on, deferring tags change\n");
1415                 for (cur = tags_set; cur; cur = cur->next) {
1416                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1417                         if (cur_tag) {
1418                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_set_table,
1419                                         GINT_TO_POINTER(cur_tag));
1420                                 if (ht_data == NULL) {
1421                                         ht_data = g_new0(TagsData, 1);
1422                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1423                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1424                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_set_table,
1425                                                 GINT_TO_POINTER(cur_tag), ht_data);
1426                                 }
1427                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1428                         }
1429                 }
1430                 for (cur = tags_unset; cur; cur = cur->next) {
1431                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1432                         if (cur_tag) {
1433                                 ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1434                                         GINT_TO_POINTER(cur_tag));
1435                                 if (ht_data == NULL) {
1436                                         ht_data = g_new0(TagsData, 1);
1437                                         ht_data->str = g_strdup(tags_get_tag(cur_tag));
1438                                         ht_data->item = IMAP_FOLDER_ITEM(item);
1439                                         g_hash_table_insert(IMAP_FOLDER_ITEM(item)->tags_unset_table,
1440                                                 GINT_TO_POINTER(cur_tag), ht_data);
1441                                 }
1442                                 ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
1443                         }
1444                 }
1445         } else {
1446                 GSList *list_set = NULL;
1447                 GSList *list_unset = NULL;
1448                 GSList numlist;
1449
1450                 numlist.data = GINT_TO_POINTER(msginfo->msgnum);
1451                 numlist.next = NULL;
1452
1453                 debug_print("IMAP changing tags NOW\n");
1454                 for (cur = tags_set; cur; cur = cur->next) {
1455                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1456                         const gchar *str = tags_get_tag(cur_tag);
1457                         if (IS_NOT_RESERVED_TAG(str))
1458                                 list_set = g_slist_prepend(list_set, g_strdup(str));
1459                 }
1460                 if (list_set) {
1461                         ok = imap_set_message_flags(session,
1462                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_set, TRUE);
1463                         slist_free_strings_full(list_set);
1464                         if (ok != MAILIMAP_NO_ERROR) {
1465                                 return;
1466                         }
1467                 }
1468
1469                 for (cur = tags_unset; cur; cur = cur->next) {
1470                         gint cur_tag = GPOINTER_TO_INT(cur->data);
1471                         const gchar *str = tags_get_tag(cur_tag);
1472                         if (IS_NOT_RESERVED_TAG(str))
1473                                 list_unset = g_slist_prepend(list_unset, g_strdup(str));
1474                 }
1475                 if (list_unset) {
1476                         ok = imap_set_message_flags(session,
1477                                 IMAP_FOLDER_ITEM(item), &numlist, 0, list_unset, FALSE);
1478                         slist_free_strings_full(list_unset);
1479                         if (ok != MAILIMAP_NO_ERROR) {
1480                                 return;
1481                         }
1482                 }
1483         }
1484 }
1485
1486 static gchar *imap_fetch_msg_full(Folder *folder, FolderItem *item, gint uid,
1487                                   gboolean headers, gboolean body)
1488 {
1489         gchar *path, *filename;
1490         IMAPSession *session;
1491         gint ok;
1492
1493         g_return_val_if_fail(folder != NULL, NULL);
1494         g_return_val_if_fail(item != NULL, NULL);
1495
1496         if (uid == 0)
1497                 return NULL;
1498
1499         path = folder_item_get_path(item);
1500         if (!is_dir_exist(path)) {
1501                 if(is_file_exist(path))
1502                         claws_unlink(path);
1503                 make_dir_hier(path);
1504         }
1505         g_free(path);
1506
1507         filename = imap_get_cached_filename(item, uid);
1508         debug_print("trying to fetch cached %s\n", filename);
1509
1510         if (is_file_exist(filename)) {
1511                 /* see whether the local file represents the whole message
1512                  * or not. As the IMAP server reports size with \r chars,
1513                  * we have to update the local file (UNIX \n only) size */
1514                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1515                 guint have_size = -1;
1516
1517                 if (cached)
1518                         debug_print("message %d has been already %scached.\n", uid,
1519                                 MSG_IS_FULLY_CACHED(cached->flags) ? "fully ":"");
1520
1521                 if (!cached || !MSG_IS_FULLY_CACHED(cached->flags)) {
1522                         have_size = get_file_size_with_crs(filename);
1523                         if (cached && (cached->size <= have_size || !body)) {
1524                                 ok = file_strip_crs(filename);
1525                                 if (ok == 0 && cached && cached->size <= have_size) {
1526                                         /* we have it all and stripped */
1527                                         debug_print("...fully cached in fact (%u/%zd); setting flag.\n",
1528                                                         have_size, cached->size);
1529                                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1530                                 }
1531                                 procmsg_msginfo_free(cached);
1532                                 return filename;
1533                         } else if (!cached && time(NULL) - get_file_mtime(filename) < 60) {
1534                                 debug_print("message not cached and file recent, considering file complete\n");
1535                                 ok = file_strip_crs(filename);
1536                                 if (ok == 0)
1537                                         return filename;
1538                         } else {
1539                                 procmsg_msginfo_free(cached);
1540                         }
1541                 }
1542                 if (cached && MSG_IS_FULLY_CACHED(cached->flags)) {
1543                         procmsg_msginfo_free(cached);
1544                         return filename;
1545                 }
1546         } else {
1547                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1548                 if (cached) {
1549                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1550                         procmsg_msginfo_free(cached);
1551                 }
1552         }
1553
1554         debug_print("getting session...\n");
1555         session = imap_session_get(folder);
1556
1557         if (!session) {
1558                 g_free(filename);
1559                 return NULL;
1560         }
1561         session_set_access_time(SESSION(session));
1562         lock_session(session); /* unlocked later in the function */
1563
1564         debug_print("IMAP fetching messages\n");
1565         ok = imap_select(session, IMAP_FOLDER(folder), item,
1566                          NULL, NULL, NULL, NULL, NULL, FALSE);
1567         if (ok != MAILIMAP_NO_ERROR) {
1568                 g_warning("can't select mailbox %s\n", item->path);
1569                 g_free(filename);
1570                 return NULL;
1571         }
1572
1573         session_set_access_time(SESSION(session));
1574
1575         debug_print("getting message %d...\n", uid);
1576         ok = imap_cmd_fetch(session, (guint32)uid, filename, headers, body);
1577
1578         if (ok != MAILIMAP_NO_ERROR) {
1579                 g_warning("can't fetch message %d\n", uid);
1580                 g_free(filename);
1581                 return NULL;
1582         }
1583
1584         session_set_access_time(SESSION(session));
1585         unlock_session(session);
1586
1587         ok = file_strip_crs(filename);
1588
1589         if (ok == 0 && headers && body) {
1590                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1591                 if (cached) {
1592                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1593                         procmsg_msginfo_free(cached);
1594                 }
1595         } else if (ok == -1) {
1596                 MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1597                 if (cached) {
1598                         procmsg_msginfo_unset_flags(cached, MSG_FULLY_CACHED, 0);
1599                         procmsg_msginfo_free(cached);
1600                 }
1601         }
1602         return filename;
1603 }
1604
1605 static gboolean imap_is_msg_fully_cached(Folder *folder, FolderItem *item, gint uid)
1606 {
1607         gchar *filename;
1608         guint size = 0;
1609         MsgInfo *cached = msgcache_get_msg(item->cache,uid);
1610
1611         if (!cached)
1612                 return FALSE;
1613
1614         if (MSG_IS_FULLY_CACHED(cached->flags)) {
1615                 procmsg_msginfo_free(cached);
1616                 return TRUE;
1617         }
1618
1619         filename = imap_get_cached_filename(item, uid);
1620
1621         if (is_file_exist(filename)) {
1622                 if (cached && cached->total_size == cached->size) {
1623                         /* fast path */
1624                         g_free(filename);
1625                         procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1626                         return TRUE;
1627                 }
1628                 size = get_file_size_with_crs(filename);
1629         }
1630         g_free(filename);
1631         debug_print("msg %d cached, has size %d, full should be %zd.\n", uid, size, cached->size);
1632         if (cached && size >= cached->size) {
1633                 cached->total_size = cached->size;
1634                 procmsg_msginfo_set_flags(cached, MSG_FULLY_CACHED, 0);
1635                 procmsg_msginfo_free(cached);
1636                 return TRUE;
1637         }
1638         if (cached)
1639                 procmsg_msginfo_free(cached);
1640         return FALSE;
1641 }
1642
1643 void imap_cache_msg(FolderItem *item, gint msgnum)
1644 {
1645         Folder *folder = NULL;
1646
1647         if (!item)
1648                 return;
1649         folder = item->folder;
1650
1651         if (!imap_is_msg_fully_cached(folder, item, msgnum)) {
1652                 gchar *tmp = imap_fetch_msg_full(folder, item, msgnum, TRUE, TRUE);
1653                 debug_print("fetched %s\n", tmp);
1654                 g_free(tmp);
1655         }
1656 }
1657
1658 static gint imap_add_msg(Folder *folder, FolderItem *dest,
1659                          const gchar *file, MsgFlags *flags)
1660 {
1661         gint ret;
1662         GSList file_list;
1663         MsgFileInfo fileinfo;
1664
1665         g_return_val_if_fail(file != NULL, -1);
1666
1667         fileinfo.msginfo = NULL;
1668         fileinfo.file = (gchar *)file;
1669         fileinfo.flags = flags;
1670         file_list.data = &fileinfo;
1671         file_list.next = NULL;
1672
1673         ret = imap_add_msgs(folder, dest, &file_list, NULL);
1674         return ret;
1675 }
1676
1677 static gint imap_add_msgs(Folder *folder, FolderItem *dest, GSList *file_list,
1678                    GHashTable *relation)
1679 {
1680         gchar *destdir;
1681         IMAPSession *session;
1682         guint32 last_uid = 0;
1683         GSList *cur;
1684         MsgFileInfo *fileinfo;
1685         gint ok = MAILIMAP_NO_ERROR;
1686         gint curnum = 0, total = 0;
1687         gboolean missing_uids = FALSE;
1688
1689         g_return_val_if_fail(folder != NULL, -1);
1690         g_return_val_if_fail(dest != NULL, -1);
1691         g_return_val_if_fail(file_list != NULL, -1);
1692
1693         debug_print("getting session...\n");
1694         session = imap_session_get(folder);
1695         if (!session) {
1696                 return -1;
1697         }
1698         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1699         if (is_fatal(ok)) {
1700                 g_free(destdir);
1701                 return -1;
1702         }
1703         statusbar_print_all(_("Adding messages..."));
1704         total = g_slist_length(file_list);
1705         for (cur = file_list; cur != NULL; cur = cur->next) {
1706                 IMAPFlags iflags = 0;
1707                 guint32 new_uid = 0;
1708                 gchar *real_file = NULL;
1709                 fileinfo = (MsgFileInfo *)cur->data;
1710
1711                 statusbar_progress_all(curnum, total, total < 10 ? 1:10);
1712                 curnum++;
1713
1714                 if (fileinfo->flags) {
1715                         if (MSG_IS_MARKED(*fileinfo->flags))
1716                                 iflags |= IMAP_FLAG_FLAGGED;
1717                         if (MSG_IS_REPLIED(*fileinfo->flags))
1718                                 iflags |= IMAP_FLAG_ANSWERED;
1719                         if (MSG_IS_FORWARDED(*fileinfo->flags))
1720                                 iflags |= IMAP_FLAG_FORWARDED;
1721                         if (MSG_IS_SPAM(*fileinfo->flags))
1722                                 iflags |= IMAP_FLAG_SPAM;
1723                         else
1724                                 iflags |= IMAP_FLAG_HAM;
1725                         if (!MSG_IS_UNREAD(*fileinfo->flags))
1726                                 iflags |= IMAP_FLAG_SEEN;
1727
1728                 }
1729
1730                 if (real_file == NULL)
1731                         real_file = g_strdup(fileinfo->file);
1732
1733                 if (folder_has_parent_of_type(dest, F_QUEUE) ||
1734                     folder_has_parent_of_type(dest, F_OUTBOX) ||
1735                     folder_has_parent_of_type(dest, F_DRAFT) ||
1736                     folder_has_parent_of_type(dest, F_TRASH))
1737                         iflags |= IMAP_FLAG_SEEN;
1738
1739                 ok = imap_cmd_append(session, IMAP_FOLDER_ITEM(dest), destdir, real_file, iflags,
1740                                      &new_uid);
1741
1742                 if (ok != MAILIMAP_NO_ERROR) {
1743                         g_warning("can't append message %s\n", real_file);
1744                         g_free(real_file);
1745                         g_free(destdir);
1746                         statusbar_progress_all(0,0,0);
1747                         statusbar_pop_all();
1748                         return -1;
1749                 } else {
1750                         debug_print("appended new message as %d\n", new_uid);
1751                         /* put the local file in the imapcache, so that we don't
1752                          * have to fetch it back later. */
1753
1754                         if (new_uid == 0) {
1755                                 missing_uids = TRUE;
1756                                 debug_print("Missing UID (0)\n");
1757                         }
1758                         if (new_uid > 0) {
1759                                 gchar *cache_path = folder_item_get_path(dest);
1760                                 if (!is_dir_exist(cache_path))
1761                                         make_dir_hier(cache_path);
1762                                 if (is_dir_exist(cache_path)) {
1763                                         gchar *cache_file = g_strconcat(
1764                                                 cache_path, G_DIR_SEPARATOR_S,
1765                                                 itos(new_uid), NULL);
1766                                         copy_file(real_file, cache_file, TRUE);
1767                                         debug_print("got UID %d, copied to cache: %s\n", new_uid, cache_file);
1768                                         g_free(cache_file);
1769                                 }
1770                                 g_free(cache_path);
1771                         }
1772                 }
1773
1774                 if (relation != NULL)
1775                         g_hash_table_insert(relation, fileinfo->msginfo != NULL ?
1776                                           (gpointer) fileinfo->msginfo : (gpointer) fileinfo,
1777                                           GINT_TO_POINTER(new_uid));
1778                 if (last_uid < new_uid) {
1779                         last_uid = new_uid;
1780                 }
1781
1782                 g_free(real_file);
1783         }
1784
1785         statusbar_progress_all(0,0,0);
1786         statusbar_pop_all();
1787
1788
1789         g_free(destdir);
1790
1791         imap_scan_required(folder, dest);
1792
1793         session = imap_session_get(folder);
1794         if (!session) {
1795                 return -1;
1796         }
1797         if (missing_uids) {
1798                 gint a;
1799                 ok = imap_select(session, IMAP_FOLDER(folder), dest,
1800                          &a, NULL, NULL, NULL, NULL, FALSE);
1801         }
1802         return last_uid;
1803 }
1804
1805 static GSList *flatten_mailimap_set(struct mailimap_set * set)
1806 {
1807         GSList *result = NULL;
1808         clistiter *list;
1809         guint32 start, end, t;
1810         GSList *cur;
1811
1812         if (!set || !set->set_list)
1813                 return NULL;
1814
1815         for (list = clist_begin(set->set_list); list; list = clist_next(list)) {
1816                 struct mailimap_set_item *item = (struct mailimap_set_item *)clist_content(list);
1817                 start = item->set_first;
1818                 end = item->set_last;
1819                 if (start <= end) {
1820                         for (t = start; t <= end; t++) {
1821                                 result = g_slist_prepend(result, GINT_TO_POINTER(t));
1822                         }
1823                 }
1824         }
1825         result = g_slist_reverse(result);
1826         if (debug_get_mode()) {
1827                 debug_print("flat imap set: ");
1828                 for (cur = result; cur; cur = cur->next) {
1829                         debug_print("%d ", GPOINTER_TO_INT(cur->data));
1830                 }
1831                 debug_print("\n");
1832         }
1833
1834         return result;
1835 }
1836 static gint imap_do_copy_msgs(Folder *folder, FolderItem *dest,
1837                               MsgInfoList *msglist, GHashTable *relation,
1838                               gboolean same_dest_ok)
1839 {
1840         FolderItem *src;
1841         gchar *destdir;
1842         GSList *seq_list, *cur;
1843         MsgInfo *msginfo;
1844         IMAPSession *session;
1845         gint ok = MAILIMAP_NO_ERROR;
1846         GHashTable *uid_hash;
1847         gint last_num = 0;
1848
1849         g_return_val_if_fail(folder != NULL, -1);
1850         g_return_val_if_fail(dest != NULL, -1);
1851         g_return_val_if_fail(msglist != NULL, -1);
1852
1853         debug_print("getting session...\n");
1854         session = imap_session_get(folder);
1855
1856         if (!session) {
1857                 return -1;
1858         }
1859
1860         msginfo = (MsgInfo *)msglist->data;
1861         src = msginfo->folder;
1862         if (!same_dest_ok && src == dest) {
1863                 g_warning("the src folder is identical to the dest.\n");
1864                 return -1;
1865         }
1866
1867         if (src->folder != dest->folder) {
1868                 GSList *infolist = NULL, *cur;
1869                 int res = -1;
1870                 for (cur = msglist; cur; cur = cur->next) {
1871                         msginfo = (MsgInfo *)cur->data;
1872                         MsgFileInfo *fileinfo = g_new0(MsgFileInfo, 1);
1873                         fileinfo->file = procmsg_get_message_file(msginfo);
1874                         fileinfo->flags = &(msginfo->flags);
1875                         infolist = g_slist_prepend(infolist, fileinfo);
1876                 }
1877                 infolist = g_slist_reverse(infolist);
1878                 res = folder_item_add_msgs(dest, infolist, FALSE);
1879                 for (cur = infolist; cur; cur = cur->next) {
1880                         MsgFileInfo *info = (MsgFileInfo *)cur->data;
1881                         g_free(info->file);
1882                         g_free(info);
1883                 }
1884                 g_slist_free(infolist);
1885                 return res;
1886         }
1887
1888         lock_session(session); /* unlocked later in the function */
1889
1890         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
1891                          NULL, NULL, NULL, NULL, NULL, FALSE);
1892         if (ok != MAILIMAP_NO_ERROR) {
1893                 return ok;
1894         }
1895
1896         unlock_session(session);
1897
1898         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
1899
1900         if (is_fatal(ok)) {
1901                 g_free(destdir);
1902                 return ok;
1903         }
1904
1905         seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msglist);
1906         uid_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
1907
1908         statusbar_print_all(_("Copying messages..."));
1909         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
1910                 struct mailimap_set * seq_set;
1911                 struct mailimap_set * source = NULL;
1912                 struct mailimap_set * dest = NULL;
1913                 seq_set = cur->data;
1914
1915                 debug_print("Copying messages from %s to %s ...\n",
1916                             src->path, destdir);
1917
1918                 lock_session(session); /* unlocked later in the function */
1919                 ok = imap_cmd_copy(session, seq_set, destdir,
1920                         &source, &dest);
1921
1922                 if (is_fatal(ok)) {
1923                         session = NULL;
1924                 }
1925
1926                 if (ok == MAILIMAP_NO_ERROR) {
1927                         unlock_session(session);
1928                         if (relation && source && dest) {
1929                                 GSList *s_list = flatten_mailimap_set(source);
1930                                 GSList *d_list = flatten_mailimap_set(dest);
1931                                 GSList *s_cur, *d_cur;
1932                                 if (g_slist_length(s_list) == g_slist_length(d_list)) {
1933
1934                                         for (s_cur = s_list, d_cur = d_list;
1935                                              s_cur && d_cur;
1936                                              s_cur = s_cur->next, d_cur = d_cur->next) {
1937                                                 g_hash_table_insert(uid_hash, s_cur->data, d_cur->data);
1938                                         }
1939
1940                                 } else {
1941                                         debug_print("hhhmm, source list length != dest list length.\n");
1942                                 }
1943                                 g_slist_free(s_list);
1944                                 g_slist_free(d_list);
1945                         }
1946                 }
1947
1948
1949                 if (source)
1950                         mailimap_set_free(source);
1951                 if (dest)
1952                         mailimap_set_free(dest);
1953
1954                 if (ok != MAILIMAP_NO_ERROR) {
1955                         g_hash_table_destroy(uid_hash);
1956                         imap_lep_set_free(seq_list);
1957                         statusbar_pop_all();
1958                         return -1;
1959                 }
1960         }
1961
1962         for (cur = msglist; cur != NULL; cur = g_slist_next(cur)) {
1963                 MsgInfo *msginfo = (MsgInfo *)cur->data;
1964                 gpointer hashval;
1965
1966                 hashval = g_hash_table_lookup(uid_hash, GINT_TO_POINTER(msginfo->msgnum));
1967
1968                 if (hashval != NULL) {
1969                         gint num = GPOINTER_TO_INT(hashval);
1970                         g_hash_table_insert(relation, msginfo,
1971                                           GINT_TO_POINTER(num));
1972                         if (num > last_num)
1973                                 last_num = num;
1974                         debug_print("copied message %d as %d\n", msginfo->msgnum, num);
1975                         /* put the local file in the imapcache, so that we don't
1976                          * have to fetch it back later. */
1977                         if (num > 0) {
1978                                 gchar *cache_path = folder_item_get_path(msginfo->folder);
1979                                 gchar *real_file = g_strconcat(
1980                                         cache_path, G_DIR_SEPARATOR_S,
1981                                         itos(msginfo->msgnum), NULL);
1982                                 gchar *cache_file = NULL;
1983                                 g_free(cache_path);
1984                                 cache_path = folder_item_get_path(dest);
1985                                 cache_file = g_strconcat(
1986                                         cache_path, G_DIR_SEPARATOR_S,
1987                                         itos(num), NULL);
1988                                 if (!is_dir_exist(cache_path))
1989                                         make_dir_hier(cache_path);
1990                                 if (is_file_exist(real_file) && is_dir_exist(cache_path)) {
1991                                         copy_file(real_file, cache_file, TRUE);
1992                                         debug_print("copied to cache: %s\n", cache_file);
1993                                 }
1994                                 g_free(real_file);
1995                                 g_free(cache_file);
1996                                 g_free(cache_path);
1997                         }
1998                 } else
1999                         g_hash_table_insert(relation, msginfo,
2000                                           GINT_TO_POINTER(0));
2001         }
2002         statusbar_pop_all();
2003
2004         g_hash_table_destroy(uid_hash);
2005         imap_lep_set_free(seq_list);
2006
2007         g_free(destdir);
2008
2009         IMAP_FOLDER_ITEM(dest)->lastuid = 0;
2010         IMAP_FOLDER_ITEM(dest)->uid_next = 0;
2011         g_slist_free(IMAP_FOLDER_ITEM(dest)->uid_list);
2012         IMAP_FOLDER_ITEM(dest)->uid_list = NULL;
2013
2014         imap_scan_required(folder, dest);
2015         if (ok == MAILIMAP_NO_ERROR)
2016                 return last_num;
2017         else
2018                 return -1;
2019 }
2020
2021 static gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
2022 {
2023         GSList msglist;
2024
2025         g_return_val_if_fail(msginfo != NULL, -1);
2026
2027         msglist.data = msginfo;
2028         msglist.next = NULL;
2029
2030         return imap_copy_msgs(folder, dest, &msglist, NULL);
2031 }
2032
2033 static gint imap_copy_msgs(Folder *folder, FolderItem *dest,
2034                     MsgInfoList *msglist, GHashTable *relation)
2035 {
2036         MsgInfo *msginfo;
2037         gint ret;
2038
2039         g_return_val_if_fail(folder != NULL, -1);
2040         g_return_val_if_fail(dest != NULL, -1);
2041         g_return_val_if_fail(msglist != NULL, -1);
2042
2043         msginfo = (MsgInfo *)msglist->data;
2044         g_return_val_if_fail(msginfo->folder != NULL, -1);
2045
2046         ret = imap_do_copy_msgs(folder, dest, msglist, relation, FALSE);
2047         return ret;
2048 }
2049
2050 static gboolean imap_matcher_type_is_local(gint matchertype)
2051 {
2052         switch (matchertype) {
2053         case MATCHCRITERIA_FROM:
2054         case MATCHCRITERIA_TO:
2055         case MATCHCRITERIA_CC:
2056         case MATCHCRITERIA_TO_OR_CC:
2057         case MATCHCRITERIA_SUBJECT:
2058         case MATCHCRITERIA_REFERENCES:
2059         case MATCHCRITERIA_INREPLYTO:
2060         case MATCHCRITERIA_AGE_GREATER:
2061         case MATCHCRITERIA_AGE_LOWER:
2062         case MATCHCRITERIA_FORWARDED:
2063         case MATCHCRITERIA_SPAM:
2064         case MATCHCRITERIA_UNREAD:
2065         case MATCHCRITERIA_NEW:
2066         case MATCHCRITERIA_MARKED:
2067         case MATCHCRITERIA_REPLIED:
2068         case MATCHCRITERIA_DELETED:
2069         case MATCHCRITERIA_SIZE_GREATER:
2070         case MATCHCRITERIA_SIZE_SMALLER:
2071         case MATCHCRITERIA_SIZE_EQUAL:
2072                 return TRUE;
2073         }
2074         return FALSE;
2075 }
2076
2077 static IMAPSearchKey* search_make_key(MatcherProp* match, gboolean* is_all)
2078 {
2079         if (match->matchtype == MATCHTYPE_MATCHCASE || match->matchtype == MATCHTYPE_MATCH) {
2080                 IMAPSearchKey* result = NULL;
2081                 gboolean invert = FALSE;
2082                 gint matchertype = match->criteria;
2083
2084                 if (is_all) {
2085                         *is_all = FALSE;
2086                 }
2087
2088                 switch (matchertype) {
2089                 case MATCHCRITERIA_NOT_NEW: invert = TRUE; matchertype = MATCHCRITERIA_NEW; break;
2090                 case MATCHCRITERIA_NOT_MARKED: invert = TRUE; matchertype = MATCHCRITERIA_MARKED; break;
2091                 case MATCHCRITERIA_NOT_FORWARDED: invert = TRUE; matchertype = MATCHCRITERIA_FORWARDED; break;
2092                 case MATCHCRITERIA_NOT_SPAM: invert = TRUE; matchertype = MATCHCRITERIA_SPAM; break;
2093                 case MATCHCRITERIA_NOT_SUBJECT: invert = TRUE; matchertype = MATCHCRITERIA_SUBJECT; break;
2094                 case MATCHCRITERIA_NOT_FROM: invert = TRUE; matchertype = MATCHCRITERIA_FROM; break;
2095                 case MATCHCRITERIA_NOT_TO: invert = TRUE; matchertype = MATCHCRITERIA_TO; break;
2096                 case MATCHCRITERIA_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_CC; break;
2097                 case MATCHCRITERIA_NOT_REFERENCES: invert = TRUE; matchertype = MATCHCRITERIA_REFERENCES; break;
2098                 case MATCHCRITERIA_NOT_HEADER: invert = TRUE; matchertype = MATCHCRITERIA_HEADER; break;
2099                 case MATCHCRITERIA_NOT_TAG: invert = TRUE; matchertype = MATCHCRITERIA_TAG; break;
2100                 case MATCHCRITERIA_NOT_HEADERS_PART: invert = TRUE; matchertype = MATCHCRITERIA_HEADERS_PART; break;
2101                 case MATCHCRITERIA_NOT_MESSAGE: invert = TRUE; matchertype = MATCHCRITERIA_MESSAGE; break;
2102                 case MATCHCRITERIA_NOT_BODY_PART: invert = TRUE; matchertype = MATCHCRITERIA_BODY_PART; break;
2103                 case MATCHCRITERIA_NOT_TO_AND_NOT_CC: invert = TRUE; matchertype = MATCHCRITERIA_TO_OR_CC; break;
2104                 case MATCHCRITERIA_NOT_INREPLYTO: invert = TRUE; matchertype = MATCHCRITERIA_INREPLYTO; break;
2105                 }
2106
2107                 /*
2108                  * this aborts conversion even for predicates understood by the following code.
2109                  * while that might seem wasteful, claws local search for information listed below
2110                  * has proven faster than IMAP search plus network roundtrips. once this changes,
2111                  * consider removing these exceptions.
2112                  */
2113                 if (imap_matcher_type_is_local(matchertype))
2114                         return NULL;
2115
2116                 /* the Message-ID header is also cached */
2117                 if (matchertype == MATCHCRITERIA_HEADER && g_strcmp0("Message-ID", match->header) == 0) {
2118                         return NULL;
2119                 }
2120
2121                 switch (matchertype) {
2122                 case MATCHCRITERIA_FORWARDED:
2123                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_FORWARDED, 0);
2124                         break;
2125
2126                 case MATCHCRITERIA_SPAM:
2127                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, RTAG_JUNK, 0);
2128                         break;
2129
2130                 case MATCHCRITERIA_INREPLYTO:
2131                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "In-Reply-To", match->expr, 0);
2132                         break;
2133
2134                 case MATCHCRITERIA_REFERENCES:
2135                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, "References", match->expr, 0);
2136                         break;
2137
2138                 case MATCHCRITERIA_TO_OR_CC:
2139                         result = imap_search_or(
2140                                         imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0),
2141                                         imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0)
2142                                         );
2143                         break;
2144
2145                 case MATCHCRITERIA_HEADERS_PART:
2146                         result = imap_search_and(
2147                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0)),
2148                                         imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0)
2149                                         );
2150                         break;
2151
2152                 case MATCHCRITERIA_SIZE_EQUAL:
2153                         result = imap_search_and(
2154                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value)),
2155                                         imap_search_not(imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value))
2156                                         );
2157                         break;
2158
2159                 case MATCHCRITERIA_NOT_UNREAD:
2160                         result = imap_search_new(IMAP_SEARCH_CRITERIA_READ, NULL, NULL, 0);
2161                         break;
2162
2163                 case MATCHCRITERIA_UNREAD:
2164                         result = imap_search_new(IMAP_SEARCH_CRITERIA_UNREAD, NULL, NULL, 0);
2165                         break;
2166
2167                 case MATCHCRITERIA_NEW:
2168                         result = imap_search_new(IMAP_SEARCH_CRITERIA_NEW, NULL, NULL, 0);
2169                         break;
2170
2171                 case MATCHCRITERIA_MARKED:
2172                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MARKED, NULL, NULL, 0);
2173                         break;
2174
2175                 case MATCHCRITERIA_DELETED:
2176                         result = imap_search_new(IMAP_SEARCH_CRITERIA_DELETED, NULL, NULL, 0);
2177                         break;
2178
2179                 case MATCHCRITERIA_REPLIED:
2180                         result = imap_search_new(IMAP_SEARCH_CRITERIA_REPLIED, NULL, NULL, 0);
2181                         break;
2182
2183                 case MATCHCRITERIA_TAG:
2184                         {
2185                                 gchar *tmp = imap_utf8_to_modified_utf7(match->expr, TRUE);
2186                                 result = imap_search_new(IMAP_SEARCH_CRITERIA_TAG, NULL, tmp, 0);
2187                                 g_free(tmp);
2188                         }
2189                         break;
2190
2191                 case MATCHCRITERIA_SUBJECT:
2192                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SUBJECT, NULL, match->expr, 0);
2193                         break;
2194
2195                 case MATCHCRITERIA_FROM:
2196                         result = imap_search_new(IMAP_SEARCH_CRITERIA_FROM, NULL, match->expr, 0);
2197                         break;
2198
2199                 case MATCHCRITERIA_TO:
2200                         result = imap_search_new(IMAP_SEARCH_CRITERIA_TO, NULL, match->expr, 0);
2201                         break;
2202
2203                 case MATCHCRITERIA_CC:
2204                         result = imap_search_new(IMAP_SEARCH_CRITERIA_CC, NULL, match->expr, 0);
2205                         break;
2206
2207                 case MATCHCRITERIA_AGE_GREATER:
2208                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_GREATER, NULL, NULL, match->value);
2209                         break;
2210
2211                 case MATCHCRITERIA_AGE_LOWER:
2212                         result = imap_search_new(IMAP_SEARCH_CRITERIA_AGE_LOWER, NULL, NULL, match->value);
2213                         break;
2214
2215                 case MATCHCRITERIA_BODY_PART:
2216                         result = imap_search_new(IMAP_SEARCH_CRITERIA_BODY, NULL, match->expr, 0);
2217                         break;
2218
2219                 case MATCHCRITERIA_MESSAGE:
2220                         result = imap_search_new(IMAP_SEARCH_CRITERIA_MESSAGE, NULL, match->expr, 0);
2221                         break;
2222
2223                 case MATCHCRITERIA_HEADER:
2224                         result = imap_search_new(IMAP_SEARCH_CRITERIA_HEADER, match->header, match->expr, 0);
2225                         break;
2226
2227                 case MATCHCRITERIA_SIZE_GREATER:
2228                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_GREATER, NULL, NULL, match->value);
2229                         break;
2230
2231                 case MATCHCRITERIA_SIZE_SMALLER:
2232                         result = imap_search_new(IMAP_SEARCH_CRITERIA_SIZE_SMALLER, NULL, NULL, match->value);
2233                         break;
2234
2235                 default:
2236                         result = imap_search_new(IMAP_SEARCH_CRITERIA_ALL, NULL, NULL, 0);
2237                         if (is_all) {
2238                                 *is_all = TRUE;
2239                         }
2240                         break;
2241                 }
2242
2243                 if (invert) {
2244                         result = imap_search_not(result);
2245                         if (is_all && *is_all) {
2246                                 *is_all = FALSE;
2247                         }
2248                 }
2249
2250                 return result;
2251         }
2252
2253         return NULL;
2254 }
2255
2256 static void imap_change_search_charset(IMAPFolder *folder)
2257 {
2258         /* If server supports charset in searches, but the last used one failed,
2259          * changed to the next preferred charset. If none are still available,
2260          * disable charset searches.
2261          * Charsets are tried in the following order:
2262          * UTF-8, locale's charset, UTF-7.
2263          */
2264
2265         if (folder->search_charset_supported) {
2266                 if (folder->search_charset && !strcmp(folder->search_charset, conv_get_locale_charset_str_no_utf8()))
2267                         folder->search_charset = "UTF-8";
2268                 else if (folder->search_charset && !strcmp(folder->search_charset, "UTF-8"))
2269                         folder->search_charset = "UTF-7";
2270                 else {
2271                         folder->search_charset = NULL;
2272                         folder->search_charset_supported = FALSE;
2273                 }
2274         }
2275 }
2276
2277 static MatcherProp *imap_matcher_prop_set_charset(IMAPFolder *folder,
2278                                                   MatcherProp *utf8_prop,
2279                                                   gchar **charset)
2280 {
2281         /* If the match is going to be done locally, or the criteria is on
2282          * tag (special-cased to modified-UTF-7), or the expression searched
2283          * is ASCII, don't bother converting.
2284          */
2285         if (imap_matcher_type_is_local(utf8_prop->criteria)
2286          || utf8_prop->criteria == MATCHCRITERIA_TAG
2287          || utf8_prop->criteria == MATCHCRITERIA_NOT_TAG
2288          || utf8_prop->expr == NULL
2289          || is_ascii_str(utf8_prop->expr))
2290                 return matcherprop_new(utf8_prop->criteria,
2291                                utf8_prop->header,
2292                                utf8_prop->matchtype,
2293                                utf8_prop->expr,
2294                                utf8_prop->value);
2295         else {
2296                 gchar *conv_expr = NULL;
2297
2298                 /* If the search is server-side and the server doesn't support
2299                  * searching with the charsets we handle, bail out.
2300                  */
2301                 if (folder->search_charset_supported == FALSE)
2302                         return NULL;
2303
2304                 /* Else, convert. */
2305                 if (*charset == NULL)
2306                         *charset = g_strdup(folder->search_charset);
2307
2308                 conv_expr = conv_codeset_strdup(utf8_prop->expr, CS_UTF_8, *charset);
2309
2310                 if (conv_expr == NULL)
2311                         conv_expr = g_strdup(utf8_prop->expr);
2312
2313                 return matcherprop_new(utf8_prop->criteria,
2314                                utf8_prop->header,
2315                                utf8_prop->matchtype,
2316                                conv_expr,
2317                                utf8_prop->value);
2318         }
2319 }
2320
2321 static gint     search_msgs             (Folder                 *folder,
2322                                          FolderItem             *container,
2323                                          MsgNumberList          **msgs,
2324                                          gboolean               *on_server,
2325                                          MatcherList            *predicate,
2326                                          SearchProgressNotify   progress_cb,
2327                                          gpointer               progress_data)
2328 {
2329         IMAPSearchKey* key = NULL;
2330         GSList* cur;
2331         int result = -1;
2332         clist* uidlist = NULL;
2333         gboolean server_filtering_useless = FALSE;
2334         IMAPSession *session;
2335         gchar *charset_to_use = NULL;
2336
2337         if (on_server == NULL || !*on_server) {
2338                 return folder_item_search_msgs_local(folder, container, msgs, on_server,
2339                                 predicate, progress_cb, progress_data);
2340         }
2341
2342         for (cur = predicate->matchers; cur != NULL; cur = cur->next) {
2343                 IMAPSearchKey* matcherPart = NULL;
2344                 MatcherProp* prop = (MatcherProp*) cur->data;
2345                 gboolean is_all;
2346                 MatcherProp *imap_prop = imap_matcher_prop_set_charset(IMAP_FOLDER(folder), prop, &charset_to_use);
2347
2348                 if (imap_prop == NULL) {
2349                         /* Couldn't convert matcherprop to IMAP - probably not ascii
2350                          * and server doesn't support the charsets we do. */
2351                          return -1;
2352                 }
2353
2354                 matcherPart = search_make_key(imap_prop, &is_all);
2355
2356                 matcherprop_free(imap_prop);
2357
2358                 if (on_server) {
2359                         *on_server &= matcherPart != NULL && prop->matchtype == MATCHTYPE_MATCHCASE;
2360                 }
2361
2362                 if (matcherPart) {
2363                         if (key == NULL) {
2364                                 key = matcherPart;
2365                                 server_filtering_useless = is_all;
2366                         } else if (predicate->bool_and) {
2367                                 key = imap_search_and(key, matcherPart);
2368                                 server_filtering_useless &= is_all;
2369                         } else {
2370                                 key = imap_search_or(key, matcherPart);
2371                                 server_filtering_useless |= is_all;
2372                         }
2373                 }
2374         }
2375
2376         if (server_filtering_useless) {
2377                 imap_search_free(key);
2378                 key = NULL;
2379         }
2380
2381         if (key == NULL && progress_cb != NULL) {
2382                 GSList* cur;
2383                 GSList* list;
2384                 int count = 0;
2385
2386                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2387                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2388
2389                 list = folder_item_get_msg_list(container);
2390                 for (cur = list; cur != NULL; cur = cur->next) {
2391                         *msgs = g_slist_prepend(*msgs, GUINT_TO_POINTER(((MsgInfo*) cur->data)->msgnum));
2392                         count++;
2393                 }
2394                 procmsg_msg_list_free(list);
2395
2396                 *msgs = g_slist_reverse(*msgs);
2397
2398                 return count;
2399         }
2400
2401         session = imap_session_get(folder);
2402         if (!session) {
2403                 return -1;
2404         }
2405         result = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(container),
2406                          NULL, NULL, NULL, NULL, NULL, TRUE);
2407         if (result != MAILIMAP_NO_ERROR)
2408                 return -1;
2409
2410         if (progress_cb)
2411                 progress_cb(progress_data, TRUE, 0, 0, container->total_msgs);
2412         result = imap_threaded_search(folder, IMAP_SEARCH_TYPE_KEYED, key, charset_to_use, NULL, &uidlist);
2413         if (progress_cb)
2414                 progress_cb(progress_data, TRUE, container->total_msgs, 0, container->total_msgs);
2415
2416         if (result == MAILIMAP_NO_ERROR) {
2417                 gint result = 0;
2418
2419                 *msgs = imap_uid_list_from_lep(uidlist, &result);
2420
2421                 mailimap_search_result_free(uidlist);
2422
2423                 if (charset_to_use != NULL)
2424                         g_free(charset_to_use);
2425
2426                 return result;
2427         } else if (charset_to_use != NULL) {
2428                 /* If search failed and was on an 8-bit string, try the next
2429                  * available charset to search if there still are some.
2430                  */
2431                 g_free(charset_to_use);
2432
2433                 imap_change_search_charset(IMAP_FOLDER(folder));
2434                 if (IMAP_FOLDER(folder)->search_charset_supported)
2435                         return search_msgs(folder, container, msgs, on_server, predicate,
2436                                    progress_cb, progress_data);
2437                 else
2438                         return -1;
2439         } else {
2440                 return -1;
2441         }
2442 }
2443
2444
2445 static gint imap_do_remove_msgs(Folder *folder, FolderItem *dest,
2446                                 MsgInfoList *msglist, GHashTable *relation)
2447 {
2448         gchar *destdir, *dir;
2449         GSList *numlist = NULL, *cur;
2450         MsgInfo *msginfo;
2451         IMAPSession *session;
2452         gint ok = MAILIMAP_NO_ERROR;
2453
2454         g_return_val_if_fail(folder != NULL, -1);
2455         g_return_val_if_fail(dest != NULL, -1);
2456         g_return_val_if_fail(msglist != NULL, -1);
2457
2458         debug_print("getting session...\n");
2459         session = imap_session_get(folder);
2460         if (!session) {
2461                 return -1;
2462         }
2463
2464         lock_session(session); /* unlocked later in the function */
2465
2466         msginfo = (MsgInfo *)msglist->data;
2467
2468         ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
2469                          NULL, NULL, NULL, NULL, NULL, FALSE);
2470         if (ok != MAILIMAP_NO_ERROR) {
2471                 return ok;
2472         }
2473
2474         destdir = imap_get_real_path(session, IMAP_FOLDER(folder), dest->path, &ok);
2475         if (is_fatal(ok)) {
2476                 g_free(destdir);
2477                 return ok;
2478         }
2479         for (cur = msglist; cur; cur = cur->next) {
2480                 msginfo = (MsgInfo *)cur->data;
2481                 if (!MSG_IS_DELETED(msginfo->flags))
2482                         numlist = g_slist_prepend(numlist, GINT_TO_POINTER(msginfo->msgnum));
2483         }
2484         numlist = g_slist_reverse(numlist);
2485
2486         if (numlist != NULL) {
2487                 ok = imap_set_message_flags
2488                         (session, IMAP_FOLDER_ITEM(msginfo->folder), numlist, IMAP_FLAG_DELETED, NULL, TRUE);
2489                 if (ok != MAILIMAP_NO_ERROR) {
2490                         log_warning(LOG_PROTOCOL, _("can't set deleted flags\n"));
2491                         g_free(destdir);
2492                         return ok;
2493                 }
2494         } /* else we just need to expunge */
2495         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
2496         if (ok != MAILIMAP_NO_ERROR) {
2497                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
2498                 g_free(destdir);
2499                 return ok;
2500         }
2501
2502         session->folder_content_changed = TRUE;
2503         unlock_session(session);
2504
2505         dir = folder_item_get_path(msginfo->folder);
2506         if (is_dir_exist(dir)) {
2507                 for (cur = msglist; cur; cur = cur->next) {
2508                         msginfo = (MsgInfo *)cur->data;
2509                         remove_numbered_files(dir, msginfo->msgnum, msginfo->msgnum);
2510                 }
2511         }
2512         g_free(dir);
2513
2514         g_slist_free(numlist);
2515
2516         imap_scan_required(folder, dest);
2517
2518         g_free(destdir);
2519
2520         return 0;
2521 }
2522
2523 static gint imap_remove_msgs(Folder *folder, FolderItem *dest,
2524                     MsgInfoList *msglist, GHashTable *relation)
2525 {
2526         MsgInfo *msginfo;
2527
2528         g_return_val_if_fail(folder != NULL, -1);
2529         g_return_val_if_fail(dest != NULL, -1);
2530         if (msglist == NULL)
2531                 return 0;
2532
2533         msginfo = (MsgInfo *)msglist->data;
2534         g_return_val_if_fail(msginfo->folder != NULL, -1);
2535
2536         return imap_do_remove_msgs(folder, dest, msglist, relation);
2537 }
2538
2539 static gint imap_remove_all_msg(Folder *folder, FolderItem *item)
2540 {
2541         GSList *list = folder_item_get_msg_list(item);
2542         gint res = imap_remove_msgs(folder, item, list, NULL);
2543         procmsg_msg_list_free(list);
2544         return res;
2545 }
2546
2547 static gboolean imap_is_msg_changed(Folder *folder, FolderItem *item,
2548                                     MsgInfo *msginfo)
2549 {
2550         /* TODO: properly implement this method */
2551         return FALSE;
2552 }
2553
2554 static gint imap_close(Folder *folder, FolderItem *item)
2555 {
2556         return 0;
2557 }
2558
2559 static gint imap_scan_tree_real(Folder *folder, gboolean subs_only)
2560 {
2561         FolderItem *item = NULL;
2562         IMAPSession *session;
2563         gchar *root_folder = NULL;
2564
2565         g_return_val_if_fail(folder != NULL, -1);
2566         g_return_val_if_fail(folder->account != NULL, -1);
2567
2568         debug_print("getting session...\n");
2569         session = imap_session_get(folder);
2570         if (!session) {
2571                 if (!folder->node) {
2572                         folder_tree_destroy(folder);
2573                         item = folder_item_new(folder, folder->name, NULL);
2574                         item->folder = folder;
2575                         folder->node = item->node = g_node_new(item);
2576                 }
2577                 return -1;
2578         }
2579
2580         if (folder->account->imap_dir && *folder->account->imap_dir) {
2581                 gchar *real_path;
2582                 int r = MAILIMAP_NO_ERROR;
2583                 clist * lep_list;
2584
2585                 Xstrdup_a(root_folder, folder->account->imap_dir, {return -1;});
2586                 extract_quote(root_folder, '"');
2587                 subst_char(root_folder,
2588                            imap_get_path_separator(session, IMAP_FOLDER(folder),
2589                                                    root_folder, &r),
2590                            '/');
2591                 if (is_fatal(r))
2592                         return -1;
2593                 strtailchomp(root_folder, '/');
2594                 real_path = imap_get_real_path
2595                         (session, IMAP_FOLDER(folder), root_folder, &r);
2596                 if (is_fatal(r)) {
2597                         g_free(real_path);
2598                         return -1;
2599                 }
2600                 debug_print("IMAP root directory: %s\n", real_path);
2601
2602                 /* check if root directory exist */
2603
2604                 r = imap_threaded_list(session->folder, "", real_path,
2605                                        &lep_list);
2606
2607                 if (r != MAILIMAP_NO_ERROR)
2608                         imap_handle_error(SESSION(session), NULL, r);
2609
2610                 if ((r != MAILIMAP_NO_ERROR) || (clist_count(lep_list) == 0)) {
2611                         if (!folder->node) {
2612                                 item = folder_item_new(folder, folder->name, NULL);
2613                                 item->folder = folder;
2614                                 folder->node = item->node = g_node_new(item);
2615                         }
2616                         return -1;
2617                 }
2618                 mailimap_list_result_free(lep_list);
2619
2620                 g_free(real_path);
2621         }
2622
2623         if (folder->node)
2624                 item = FOLDER_ITEM(folder->node->data);
2625
2626         if (item && !item->path && root_folder) {
2627                 item->path = g_strdup(root_folder);
2628         }
2629
2630         if (!item || ((item->path || root_folder) &&
2631                       strcmp2(item->path, root_folder) != 0)) {
2632                 folder_tree_destroy(folder);
2633                 item = folder_item_new(folder, folder->name, root_folder);
2634                 item->folder = folder;
2635                 folder->node = item->node = g_node_new(item);
2636         }
2637
2638         imap_scan_tree_recursive(session, FOLDER_ITEM(folder->node->data), subs_only);
2639         imap_create_missing_folders(folder);
2640
2641         return 0;
2642 }
2643
2644 static gint imap_scan_tree(Folder *folder)
2645 {
2646         gboolean subs_only = FALSE;
2647         if (folder->account) {
2648                 debug_print(" scanning only subs %d\n", folder->account->imap_subsonly);
2649                 subs_only = folder->account->imap_subsonly;
2650         }
2651         return imap_scan_tree_real(folder, subs_only);
2652 }
2653
2654 static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item, gboolean subs_only)
2655 {
2656         Folder *folder;
2657         IMAPFolder *imapfolder;
2658         FolderItem *new_item;
2659         GSList *item_list, *cur;
2660         GNode *node;
2661         gchar *real_path;
2662         gchar *wildcard_path;
2663         gchar separator;
2664         gchar wildcard[3];
2665         clist * lep_list;
2666         int r = MAILIMAP_NO_ERROR;
2667
2668         g_return_val_if_fail(item != NULL, -1);
2669         g_return_val_if_fail(item->folder != NULL, -1);
2670         g_return_val_if_fail(item->no_sub == FALSE, -1);
2671
2672         folder = item->folder;
2673         imapfolder = IMAP_FOLDER(folder);
2674
2675         separator = imap_get_path_separator(session, imapfolder, item->path, &r);
2676         if (is_fatal(r))
2677                 return r;
2678
2679         if (folder->ui_func)
2680                 folder->ui_func(folder, item, folder->ui_func_data);
2681
2682         if (item->path) {
2683                 wildcard[0] = separator;
2684                 wildcard[1] = '%';
2685                 wildcard[2] = '\0';
2686                 real_path = imap_get_real_path(session, imapfolder, item->path, &r);
2687                 if (is_fatal(r)) {
2688                         g_free(real_path);
2689                         return r;
2690                 }
2691         } else {
2692                 wildcard[0] = '%';
2693                 wildcard[1] = '\0';
2694                 real_path = g_strdup("");
2695         }
2696
2697         Xstrcat_a(wildcard_path, real_path, wildcard,
2698                   {g_free(real_path); return MAILIMAP_ERROR_BAD_STATE;});
2699         lep_list = NULL;
2700
2701         if (subs_only)
2702                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2703         else
2704                 r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2705
2706         if (r != MAILIMAP_NO_ERROR) {
2707                 imap_handle_error(SESSION(session), NULL, r);
2708                 item_list = NULL;
2709                 g_free(real_path);
2710                 return r;
2711         }
2712         else {
2713                 item_list = imap_list_from_lep(imapfolder,
2714                                                lep_list, real_path, FALSE);
2715                 mailimap_list_result_free(lep_list);
2716         }
2717
2718         g_free(real_path);
2719
2720         node = item->node->children;
2721         while (node != NULL) {
2722                 FolderItem *old_item = FOLDER_ITEM(node->data);
2723                 GNode *next = node->next;
2724
2725                 new_item = NULL;
2726                 for (cur = item_list; cur != NULL; cur = cur->next) {
2727                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2728                         if (!strcmp2(old_item->path, cur_item->path)) {
2729                                 new_item = cur_item;
2730                                 break;
2731                         }
2732                 }
2733                 if (!new_item) {
2734                         if (old_item && old_item->path && !strcmp(old_item->path, "INBOX")) {
2735                                 debug_print("not removing INBOX\n");
2736                         } else {
2737                                 debug_print("folder '%s' not found. removing...\n",
2738                                             old_item->path);
2739                                 folder_item_remove(old_item);
2740                         }
2741                 } else {
2742                         old_item->no_sub = new_item->no_sub;
2743                         old_item->no_select = new_item->no_select;
2744                         if (old_item->no_sub == TRUE && node->children) {
2745                                 debug_print("folder '%s' doesn't have "
2746                                             "subfolders. removing...\n",
2747                                             old_item->path);
2748                                 folder_item_remove_children(old_item);
2749                         }
2750                 }
2751
2752                 node = next;
2753         }
2754
2755         for (cur = item_list; cur != NULL; cur = cur->next) {
2756                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2757                 new_item = NULL;
2758
2759                 for (node = item->node->children; node != NULL;
2760                      node = node->next) {
2761                         if (!strcmp2(FOLDER_ITEM(node->data)->path,
2762                                      cur_item->path)) {
2763                                 new_item = FOLDER_ITEM(node->data);
2764                                 folder_item_destroy(cur_item);
2765                                 cur_item = NULL;
2766                                 break;
2767                         }
2768                 }
2769                 if (!new_item) {
2770                         new_item = cur_item;
2771                         debug_print("new folder '%s' found.\n", new_item->path);
2772                         folder_item_append(item, new_item);
2773                 }
2774
2775                 if (!strcmp(new_item->path, "INBOX")) {
2776                         new_item->stype = F_INBOX;
2777                         folder->inbox = new_item;
2778                 } else if (!folder_item_parent(item) || item->stype == F_INBOX) {
2779                         gchar *base;
2780
2781                         base = g_path_get_basename(new_item->path);
2782
2783                         if (!folder->outbox && !g_ascii_strcasecmp(base, "Sent")) {
2784                                 new_item->stype = F_OUTBOX;
2785                                 folder->outbox = new_item;
2786                         } else if (!folder->draft && !g_ascii_strcasecmp(base, "Drafts")) {
2787                                 new_item->stype = F_DRAFT;
2788                                 folder->draft = new_item;
2789                         } else if (!folder->queue && !g_ascii_strcasecmp(base, "Queue")) {
2790                                 new_item->stype = F_QUEUE;
2791                                 folder->queue = new_item;
2792                         } else if (!folder->trash && !g_ascii_strcasecmp(base, "Trash")) {
2793                                 new_item->stype = F_TRASH;
2794                                 folder->trash = new_item;
2795                         }
2796                         g_free(base);
2797                 }
2798
2799                 if (new_item->no_sub == FALSE)
2800                         imap_scan_tree_recursive(session, new_item, subs_only);
2801         }
2802
2803         g_slist_free(item_list);
2804
2805         return MAILIMAP_NO_ERROR;
2806 }
2807
2808 GList *imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
2809 {
2810         IMAPSession *session = imap_session_get(folder);
2811         gchar *real_path;
2812         gchar *wildcard_path;
2813         gchar separator;
2814         gchar wildcard[3];
2815         clist * lep_list;
2816         GSList *item_list = NULL, *cur;
2817         GList *child_list = NULL, *tmplist = NULL;
2818         GSList *sub_list = NULL;
2819         int r = MAILIMAP_NO_ERROR;
2820
2821         if (!session)
2822                 return NULL;
2823
2824         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &r);
2825         if (is_fatal(r))
2826                 return NULL;
2827
2828         if (item->path) {
2829                 wildcard[0] = separator;
2830                 wildcard[1] = '%';
2831                 wildcard[2] = '\0';
2832                 real_path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
2833                 if (is_fatal(r)) {
2834                         g_free(real_path);
2835                         return NULL;
2836                 }
2837         } else {
2838                 wildcard[0] = '%';
2839                 wildcard[1] = '\0';
2840                 real_path = g_strdup("");
2841         }
2842
2843         Xstrcat_a(wildcard_path, real_path, wildcard,
2844                   {g_free(real_path); return NULL;});
2845         lep_list = NULL;
2846
2847         if (unsubs_only)
2848                 statusbar_print_all(_("Looking for unsubscribed folders in %s..."),
2849                                 item->path?item->path:item->name);
2850         else
2851                 statusbar_print_all(_("Looking for subfolders of %s..."),
2852                                 item->path?item->path:item->name);
2853
2854         r = imap_threaded_list(folder, "", wildcard_path, &lep_list);
2855         if (r) {
2856                 g_free(real_path);
2857                 statusbar_pop_all();
2858                 return NULL;
2859         }
2860         item_list = imap_list_from_lep(IMAP_FOLDER(folder),
2861                                lep_list, real_path, FALSE);
2862         mailimap_list_result_free(lep_list);
2863
2864         for (cur = item_list; cur != NULL; cur = cur->next) {
2865                 FolderItem *cur_item = FOLDER_ITEM(cur->data);
2866                 if (recursive) {
2867                         tmplist = imap_scan_subtree(folder, cur_item,
2868                                         unsubs_only, recursive);
2869                         if (tmplist)
2870                                 child_list = g_list_concat(child_list, tmplist);
2871                 }
2872                 child_list = g_list_prepend(child_list,
2873                                 imap_get_real_path(session,
2874                                         IMAP_FOLDER(folder), cur_item->path, &r));
2875                 if (is_fatal(r)) {
2876                         g_free(real_path);
2877                         statusbar_pop_all();
2878                         return NULL;
2879                 }
2880                 folder_item_destroy(cur_item);
2881         }
2882         child_list = g_list_reverse(child_list);
2883         g_slist_free(item_list);
2884
2885         if (unsubs_only) {
2886                 r = imap_threaded_lsub(folder, "", wildcard_path, &lep_list);
2887                 if (r) {
2888                         g_free(real_path);
2889                         statusbar_pop_all();
2890                         return NULL;
2891                 }
2892                 sub_list = imap_list_from_lep(IMAP_FOLDER(folder),
2893                                        lep_list, real_path, FALSE);
2894                 mailimap_list_result_free(lep_list);
2895
2896                 for (cur = sub_list; cur != NULL; cur = cur->next) {
2897                         FolderItem *cur_item = FOLDER_ITEM(cur->data);
2898                         GList *oldlitem = NULL;
2899                         gchar *tmp = imap_get_real_path(session,
2900                                         IMAP_FOLDER(folder), cur_item->path, &r);
2901                         if (r) {
2902                                 g_free(real_path);
2903                                 statusbar_pop_all();
2904                                 g_free(tmp);
2905                                 return NULL;
2906                         }
2907                         folder_item_destroy(cur_item);
2908                         oldlitem = g_list_find_custom(
2909                                         child_list, tmp, (GCompareFunc)strcmp2);
2910                         if (oldlitem) {
2911                                 child_list = g_list_remove_link(child_list, oldlitem);
2912                                 g_free(oldlitem->data);
2913                                 g_list_free(oldlitem);
2914                         }
2915                         g_free(tmp);
2916                 }
2917         }
2918
2919         g_free(real_path);
2920         statusbar_pop_all();
2921
2922         return child_list;
2923 }
2924
2925 static gint imap_create_tree(Folder *folder)
2926 {
2927         g_return_val_if_fail(folder != NULL, -1);
2928         g_return_val_if_fail(folder->node != NULL, -1);
2929         g_return_val_if_fail(folder->node->data != NULL, -1);
2930         g_return_val_if_fail(folder->account != NULL, -1);
2931
2932         imap_scan_tree(folder);
2933         imap_create_missing_folders(folder);
2934
2935         return 0;
2936 }
2937
2938 static void imap_create_missing_folders(Folder *folder)
2939 {
2940         g_return_if_fail(folder != NULL);
2941
2942         if (!folder->inbox)
2943                 folder->inbox = imap_create_special_folder
2944                         (folder, F_INBOX, "INBOX");
2945         if (!folder->trash)
2946                 folder->trash = imap_create_special_folder
2947                         (folder, F_TRASH, "Trash");
2948         if (!folder->queue)
2949                 folder->queue = imap_create_special_folder
2950                         (folder, F_QUEUE, "Queue");
2951         if (!folder->outbox)
2952                 folder->outbox = imap_create_special_folder
2953                         (folder, F_OUTBOX, "Sent");
2954         if (!folder->draft)
2955                 folder->draft = imap_create_special_folder
2956                         (folder, F_DRAFT, "Drafts");
2957 }
2958
2959 static FolderItem *imap_create_special_folder(Folder *folder,
2960                                               SpecialFolderItemType stype,
2961                                               const gchar *name)
2962 {
2963         FolderItem *item;
2964         FolderItem *new_item;
2965
2966         g_return_val_if_fail(folder != NULL, NULL);
2967         g_return_val_if_fail(folder->node != NULL, NULL);
2968         g_return_val_if_fail(folder->node->data != NULL, NULL);
2969         g_return_val_if_fail(folder->account != NULL, NULL);
2970         g_return_val_if_fail(name != NULL, NULL);
2971
2972         item = FOLDER_ITEM(folder->node->data);
2973         new_item = imap_create_folder(folder, item, name);
2974
2975         if (!new_item) {
2976                 g_warning("Can't create '%s'\n", name);
2977                 if (!folder->inbox) return NULL;
2978
2979                 new_item = imap_create_folder(folder, folder->inbox, name);
2980                 if (!new_item)
2981                         g_warning("Can't create '%s' under INBOX\n", name);
2982                 else
2983                         new_item->stype = stype;
2984         } else
2985                 new_item->stype = stype;
2986
2987         return new_item;
2988 }
2989
2990 static gchar *imap_folder_get_path(Folder *folder)
2991 {
2992         gchar *folder_path;
2993
2994         g_return_val_if_fail(folder != NULL, NULL);
2995         g_return_val_if_fail(folder->account != NULL, NULL);
2996
2997         folder_path = g_strconcat(get_imap_cache_dir(),
2998                                   G_DIR_SEPARATOR_S,
2999                                   folder->account->recv_server,
3000                                   G_DIR_SEPARATOR_S,
3001                                   folder->account->userid,
3002                                   NULL);
3003
3004         return folder_path;
3005 }
3006
3007 #ifdef G_OS_WIN32
3008 static gchar *imap_encode_unsafe_chars(const gchar *str)
3009 {
3010         gchar *ret = NULL, *o_ret;
3011         gchar *i;
3012         if (!str)
3013                 return NULL;
3014         ret = g_malloc(3*strlen(str)+1);
3015         o_ret = ret;
3016         for (i = str; *i; i++) {
3017                 switch(*i) {
3018                         case ':':
3019                         case '|':
3020                         case '<':
3021                         case '>':
3022                         case '*':
3023                         case '?':
3024                         case '#':
3025                                 *ret++ = '%';
3026                                 *ret++ = '0'+(*i/10);
3027                                 *ret++ = '0'+(*i%10);
3028                                 break;
3029                         default:
3030                                 *ret++ = *i;
3031                 }
3032         }
3033         *ret++ = '\0';
3034         return o_ret;
3035 }
3036 #endif
3037 static gchar *imap_item_get_path(Folder *folder, FolderItem *item)
3038 {
3039         gchar *folder_path, *path;
3040         gchar *item_path = NULL;
3041
3042         g_return_val_if_fail(folder != NULL, NULL);
3043         g_return_val_if_fail(item != NULL, NULL);
3044         folder_path = imap_folder_get_path(folder);
3045
3046         g_return_val_if_fail(folder_path != NULL, NULL);
3047
3048 #ifdef G_OS_UNIX
3049         item_path = g_strdup(item->path);
3050 #else
3051         item_path = imap_encode_unsafe_chars(item->path);
3052 #endif
3053
3054         if (g_path_is_absolute(folder_path)) {
3055                 if (item_path)
3056                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
3057                                            item_path, NULL);
3058                 else
3059                         path = g_strdup(folder_path);
3060         } else {
3061                 if (item_path)
3062                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3063                                            folder_path, G_DIR_SEPARATOR_S,
3064                                            item_path, NULL);
3065                 else
3066                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
3067                                            folder_path, NULL);
3068         }
3069         g_free(folder_path);
3070         g_free(item_path);
3071 #ifdef G_OS_WIN32
3072         while (strchr(path, '/'))
3073                 *strchr(path, '/') = '\\';
3074 #endif
3075
3076         return path;
3077 }
3078
3079 static FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
3080                                const gchar *name)
3081 {
3082         gchar *dirpath, *imap_path;
3083         IMAPSession *session;
3084         FolderItem *new_item;
3085         gchar separator;
3086         gchar *new_name;
3087         const gchar *p;
3088         gint ok = MAILIMAP_NO_ERROR;
3089         gboolean no_select = FALSE, no_sub = FALSE;
3090         gboolean exist = FALSE;
3091
3092         g_return_val_if_fail(folder != NULL, NULL);
3093         g_return_val_if_fail(folder->account != NULL, NULL);
3094         g_return_val_if_fail(parent != NULL, NULL);
3095         g_return_val_if_fail(name != NULL, NULL);
3096
3097         if (to_number(name) > 0) {
3098                 gchar *cached_msg = imap_get_cached_filename(parent, to_number(name));
3099                 if (is_file_exist(cached_msg)) {
3100                         if (claws_unlink(cached_msg) != 0) {
3101                                 return NULL;
3102                         }
3103                 }
3104         }
3105
3106         debug_print("getting session...\n");
3107         session = imap_session_get(folder);
3108         if (!session) {
3109                 return NULL;
3110         }
3111
3112         if (!folder_item_parent(parent) && strcmp(name, "INBOX") == 0) {
3113                 dirpath = g_strdup(name);
3114         }else if (parent->path)
3115                 dirpath = g_strconcat(parent->path, "/", name, NULL);
3116         else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
3117                 dirpath = g_strdup(name);
3118         else if (folder->account->imap_dir && *folder->account->imap_dir) {
3119                 gchar *imap_dir;
3120
3121                 Xstrdup_a(imap_dir, folder->account->imap_dir, {return NULL;});
3122                 strtailchomp(imap_dir, '/');
3123                 dirpath = g_strconcat(imap_dir, "/", name, NULL);
3124         } else
3125                 dirpath = g_strdup(name);
3126
3127
3128
3129         /* keep trailing directory separator to create a folder that contains
3130            sub folder */
3131         imap_path = imap_utf8_to_modified_utf7(dirpath, FALSE);
3132
3133         strtailchomp(dirpath, '/');
3134         Xstrdup_a(new_name, name, {
3135                 g_free(dirpath);
3136                 g_free(imap_path);
3137                 return NULL;});
3138
3139         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), imap_path, &ok);
3140         if (is_fatal(ok)) {
3141                 g_free(imap_path);
3142                 return NULL;
3143         }
3144         imap_path_separator_subst(imap_path, separator);
3145         /* remove trailing / for display */
3146         strtailchomp(new_name, '/');
3147
3148         if (strcmp(dirpath, "INBOX") != 0) {
3149                 GPtrArray *argbuf;
3150                 int r;
3151                 clist * lep_list;
3152
3153                 argbuf = g_ptr_array_new();
3154                 r = imap_threaded_list(folder, "", imap_path, &lep_list);
3155                 if (r != MAILIMAP_NO_ERROR) {
3156                         imap_handle_error(SESSION(session), NULL, r);
3157                         log_warning(LOG_PROTOCOL, _("can't create mailbox: LIST failed\n"));
3158                         g_free(imap_path);
3159                         g_free(dirpath);
3160                         ptr_array_free_strings(argbuf);
3161                         g_ptr_array_free(argbuf, TRUE);
3162                         return NULL;
3163                 }
3164
3165                 if (clist_count(lep_list) > 0)
3166                         exist = TRUE;
3167                 mailimap_list_result_free(lep_list);
3168                 lep_list = NULL;
3169                 if (!exist) {
3170                         ok = imap_cmd_create(session, imap_path);
3171                         if (ok != MAILIMAP_NO_ERROR) {
3172                                 log_warning(LOG_PROTOCOL, _("can't create mailbox\n"));
3173                                 g_free(imap_path);
3174                                 g_free(dirpath);
3175                                 return NULL;
3176                         }
3177                         r = imap_threaded_list(folder, "", imap_path, &lep_list);
3178                         if (r == MAILIMAP_NO_ERROR) {
3179                                 GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3180                                                lep_list, dirpath, TRUE);
3181                                 if (item_list) {
3182                                         FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3183                                         no_select = cur_item->no_select;
3184                                         no_sub = cur_item->no_sub;
3185                                         g_slist_free(item_list);
3186                                 }
3187                                 mailimap_list_result_free(lep_list);
3188                         } else {
3189                                 imap_handle_error(SESSION(session), NULL, r);
3190                         }
3191                 }
3192                 imap_threaded_subscribe(folder, imap_path, TRUE);
3193         } else {
3194                 clist *lep_list;
3195                 int r;
3196                 /* just get flags */
3197                 r = imap_threaded_list(folder, "", "INBOX", &lep_list);
3198                 if (r == MAILIMAP_NO_ERROR) {
3199                         GSList *item_list = imap_list_from_lep(IMAP_FOLDER(folder),
3200                                        lep_list, dirpath, TRUE);
3201                         if (item_list) {
3202                                 FolderItem *cur_item = FOLDER_ITEM(item_list->data);
3203                                 no_select = cur_item->no_select;
3204                                 no_sub = cur_item->no_sub;
3205                                 g_slist_free(item_list);
3206                         }
3207                         mailimap_list_result_free(lep_list);
3208                 } else {
3209                         imap_handle_error(SESSION(session), NULL, r);
3210                 }
3211         }
3212
3213         new_item = folder_item_new(folder, new_name, dirpath);
3214         new_item->no_select = no_select;
3215         new_item->no_sub = no_sub;
3216         folder_item_append(parent, new_item);
3217         g_free(imap_path);
3218         g_free(dirpath);
3219
3220         dirpath = folder_item_get_path(new_item);
3221         if (!is_dir_exist(dirpath))
3222                 make_dir_hier(dirpath);
3223         g_free(dirpath);
3224
3225         if (exist) {
3226                 /* folder existed, scan it */
3227                 imap_scan_required(folder, new_item);
3228                 folder_item_scan_full(new_item, FALSE);
3229         }
3230
3231         return new_item;
3232 }
3233
3234 static gint imap_rename_folder(Folder *folder, FolderItem *item,
3235                                const gchar *name)
3236 {
3237         gchar *dirpath;
3238         gchar *newpath;
3239         gchar *real_oldpath;
3240         gchar *real_newpath;
3241         gchar *paths[2];
3242         gchar *old_cache_dir;
3243         gchar *new_cache_dir;
3244         IMAPSession *session;
3245         gchar separator;
3246         gint ok = MAILIMAP_NO_ERROR;
3247         gint exists, recent, unseen;
3248         guint32 uid_validity;
3249
3250         g_return_val_if_fail(folder != NULL, -1);
3251         g_return_val_if_fail(item != NULL, -1);
3252         g_return_val_if_fail(item->path != NULL, -1);
3253         g_return_val_if_fail(name != NULL, -1);
3254
3255         debug_print("getting session...\n");
3256         session = imap_session_get(folder);
3257         if (!session) {
3258                 return -1;
3259         }
3260
3261         if (strchr(name, imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok)) != NULL ||
3262                 is_fatal(ok)) {
3263                 g_warning(_("New folder name must not contain the namespace "
3264                             "path separator"));
3265                 return -1;
3266         }
3267
3268         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3269         if (is_fatal(ok)) {
3270                 g_free(real_oldpath);
3271                 return -1;
3272         }
3273
3274         g_free(session->mbox);
3275         session->mbox = NULL;
3276         session->exists = 0;
3277         session->recent = 0;
3278         session->expunge = 0;
3279         ok = imap_cmd_examine(session, "INBOX",
3280                               &exists, &recent, &unseen, &uid_validity, FALSE);
3281         if (ok != MAILIMAP_NO_ERROR) {
3282                 g_free(real_oldpath);
3283                 return -1;
3284         }
3285
3286         separator = imap_get_path_separator(session, IMAP_FOLDER(folder), item->path, &ok);
3287         if (is_fatal(ok)) {
3288                 g_free(real_oldpath);
3289                 return -1;
3290         }
3291         if (strchr(item->path, G_DIR_SEPARATOR)) {
3292                 dirpath = g_path_get_dirname(item->path);
3293                 newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
3294                 g_free(dirpath);
3295         } else
3296                 newpath = g_strdup(name);
3297
3298         real_newpath = imap_utf8_to_modified_utf7(newpath, FALSE);
3299         imap_path_separator_subst(real_newpath, separator);
3300
3301         ok = imap_cmd_rename(session, real_oldpath, real_newpath);
3302         if (ok != MAILIMAP_NO_ERROR) {
3303                 log_warning(LOG_PROTOCOL, _("can't rename mailbox: %s to %s\n"),
3304                             real_oldpath, real_newpath);
3305                 g_free(real_oldpath);
3306                 g_free(newpath);
3307                 g_free(real_newpath);
3308                 return -1;
3309         }
3310         g_free(item->name);
3311         item->name = g_strdup(name);
3312
3313         old_cache_dir = folder_item_get_path(item);
3314
3315         paths[0] = g_strdup(item->path);
3316         paths[1] = newpath;
3317         g_node_traverse(item->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
3318                         imap_rename_folder_func, paths);
3319
3320         if (is_dir_exist(old_cache_dir)) {
3321                 new_cache_dir = folder_item_get_path(item);
3322                 if (g_rename(old_cache_dir, new_cache_dir) < 0) {
3323                         FILE_OP_ERROR(old_cache_dir, "rename");
3324                 }
3325                 g_free(new_cache_dir);
3326         }
3327
3328         g_free(old_cache_dir);
3329         g_free(paths[0]);
3330         g_free(newpath);
3331         g_free(real_oldpath);
3332         g_free(real_newpath);
3333         return 0;
3334 }
3335
3336 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
3337 {
3338         gchar *path;
3339         gint r = MAILIMAP_NO_ERROR;
3340         IMAPSession *session;
3341         debug_print("getting session...\n");
3342
3343         session = imap_session_get(folder);
3344         if (!session) {
3345                 return -1;
3346         }
3347         if (item && item->path) {
3348                 path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &r);
3349                 if (!path)
3350                         return -1;
3351                 if (is_fatal(r)) {
3352                         g_free(path);
3353                         return -1;
3354                 }
3355                 if (!strcmp(path, "INBOX") && sub == FALSE) {
3356                         g_free(path);
3357                         return -1;
3358                 }
3359                 debug_print("%ssubscribing %s\n", sub?"":"un", path);
3360                 r = imap_threaded_subscribe(folder, path, sub);
3361                 g_free(path);
3362         } else if (rpath) {
3363                 r = imap_threaded_subscribe(folder, rpath, sub);
3364         } else
3365                 return -1;
3366         return r;
3367 }
3368
3369 static gint imap_remove_folder_real(Folder *folder, FolderItem *item)
3370 {
3371         gint ok = MAILIMAP_NO_ERROR;
3372         IMAPSession *session;
3373         gchar *path;
3374         gchar *cache_dir;
3375         gboolean selected_folder;
3376
3377         g_return_val_if_fail(folder != NULL, -1);
3378         g_return_val_if_fail(item != NULL, -1);
3379         g_return_val_if_fail(item->path != NULL, -1);
3380
3381         debug_print("getting session...\n");
3382         session = imap_session_get(folder);
3383         if (!session) {
3384                 return -1;
3385         }
3386         path = imap_get_real_path(session, IMAP_FOLDER(folder), item->path, &ok);
3387         if (is_fatal(ok)) {
3388                 g_free(path);
3389                 return -1;
3390         }
3391         imap_threaded_subscribe(folder, path, FALSE);
3392
3393         selected_folder = (session->mbox != NULL) &&
3394                           (!strcmp(session->mbox, item->path));
3395         if (selected_folder) {
3396                 ok = imap_cmd_close(session);
3397                 if (ok != MAILIMAP_NO_ERROR) {
3398                         debug_print("close err %d\n", ok);
3399                         return ok;
3400                 }
3401         }
3402         ok = imap_cmd_delete(session, path);
3403         if (ok != MAILIMAP_NO_ERROR && !is_fatal(ok)) {
3404                 gchar *tmp = NULL;
3405
3406                 ok = MAILIMAP_NO_ERROR;
3407                 tmp = g_strdup_printf("%s%c", path,
3408                                 imap_get_path_separator(session, IMAP_FOLDER(folder), path, &ok));
3409                 g_free(path);
3410                 path = tmp;
3411                 if (!is_fatal(ok))
3412                         ok = imap_cmd_delete(session, path);
3413         }
3414
3415         if (ok != MAILIMAP_NO_ERROR) {
3416                 log_warning(LOG_PROTOCOL, _("can't delete mailbox\n"));
3417                 g_free(path);
3418                 return -1;
3419         }
3420
3421         g_free(path);
3422         cache_dir = folder_item_get_path(item);
3423         if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
3424                 g_warning("can't remove directory '%s'\n", cache_dir);
3425         g_free(cache_dir);
3426         folder_item_remove(item);
3427         return 0;
3428 }
3429
3430 static gint imap_remove_folder(Folder *folder, FolderItem *item)
3431 {
3432         GNode *node, *next;
3433
3434         g_return_val_if_fail(item != NULL, -1);
3435         g_return_val_if_fail(item->folder != NULL, -1);
3436         g_return_val_if_fail(item->node != NULL, -1);
3437
3438         node = item->node->children;
3439         while (node != NULL) {
3440                 next = node->next;
3441                 if (imap_remove_folder(folder, FOLDER_ITEM(node->data)) < 0)
3442                         return -1;
3443                 node = next;
3444         }
3445         debug_print("IMAP removing %s\n", item->path);
3446
3447         if (imap_remove_all_msg(folder, item) < 0)
3448                 return -1;
3449         return imap_remove_folder_real(folder, item);
3450 }
3451
3452 typedef struct _uncached_data {
3453         IMAPSession *session;
3454         FolderItem *item;
3455         MsgNumberList *numlist;
3456         guint cur;
3457         guint total;
3458         gboolean done;
3459         int ok;
3460 } uncached_data;
3461
3462 static void *imap_get_uncached_messages_thread(void *data)
3463 {
3464         uncached_data *stuff = (uncached_data *)data;
3465         IMAPSession *session = stuff->session;
3466         FolderItem *item = stuff->item;
3467         MsgNumberList *numlist = stuff->numlist;
3468         GSList *newlist = NULL;
3469         GSList *llast = NULL;
3470         GSList *seq_list, *cur;
3471         gboolean got_alien_tags = FALSE;
3472
3473         debug_print("uncached_messages\n");
3474
3475         if (session == NULL || item == NULL || item->folder == NULL
3476             || FOLDER_CLASS(item->folder) != &imap_class) {
3477                 stuff->done = TRUE;
3478                 return NULL;
3479         }
3480
3481         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(item->folder), numlist);
3482         debug_print("get msgs info\n");
3483         for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
3484                 struct mailimap_set * imapset;
3485                 unsigned int i;
3486                 int r;
3487                 carray * env_list;
3488                 int count;
3489
3490                 if (session->cancelled)
3491                         break;
3492
3493                 imapset = cur->data;
3494
3495                 r = imap_threaded_fetch_env(session->folder,
3496                                             imapset, &env_list);
3497                 if (r != MAILIMAP_NO_ERROR) {
3498                         imap_handle_error(SESSION(session), NULL, r);
3499                         if (is_fatal(r)) {
3500                                 stuff->ok = r;
3501                                 return NULL;
3502                         }
3503                         continue;
3504                 }
3505
3506                 session_set_access_time(SESSION(session));
3507
3508                 count = 0;
3509                 for(i = 0 ; i < carray_count(env_list) ; i += 2) {
3510                         struct imap_fetch_env_info * info;
3511                         MsgInfo * msginfo;
3512                         GSList *tags = NULL, *cur = NULL;
3513                         info = carray_get(env_list, i);
3514                         tags = carray_get(env_list, i+1);
3515                         msginfo = imap_envelope_from_lep(info, item);
3516                         if (msginfo == NULL) {
3517                                 slist_free_strings_full(tags);
3518                                 continue;
3519                         }
3520                         g_slist_free(msginfo->tags);
3521                         msginfo->tags = NULL;
3522
3523                         for (cur = tags; cur; cur = cur->next) {
3524                                 gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
3525                                 gint id = 0;
3526                                 id = tags_get_id_for_str(real_tag);
3527                                 if (id == -1) {
3528                                         id = tags_add_tag(real_tag);
3529                                         got_alien_tags = TRUE;
3530                                 }
3531                                 if (!g_slist_find(msginfo->tags, GINT_TO_POINTER(id))) {
3532                                         msginfo->tags = g_slist_prepend(
3533                                                         msginfo->tags,
3534                                                         GINT_TO_POINTER(id));
3535                                 }
3536                                 g_free(real_tag);
3537                         }
3538                         if (msginfo->tags)
3539                                 msginfo->tags = g_slist_reverse(msginfo->tags);
3540                         slist_free_strings_full(tags);
3541                         msginfo->folder = item;
3542                         if (!newlist)
3543                                 llast = newlist = g_slist_append(newlist, msginfo);
3544                         else {
3545                                 llast = g_slist_append(llast, msginfo);
3546                                 llast = llast->next;
3547                         }
3548                         count ++;
3549                 }
3550
3551                 imap_fetch_env_free(env_list);
3552         }
3553
3554         if (got_alien_tags) {
3555                 tags_write_tags();
3556                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
3557         }
3558
3559         imap_lep_set_free(seq_list);
3560
3561         session_set_access_time(SESSION(session));
3562         stuff->done = TRUE;
3563         return newlist;
3564 }
3565
3566 #define MAX_MSG_NUM 50
3567
3568 static GSList *imap_get_uncached_messages(IMAPSession *session,
3569                                         FolderItem *item,
3570                                         MsgNumberList *numlist,
3571                                         int *r)
3572 {
3573         GSList *result = NULL;
3574         GSList * cur;
3575         uncached_data *data = g_new0(uncached_data, 1);
3576
3577         cur = numlist;
3578         data->total = g_slist_length(numlist);
3579         data->ok = MAILIMAP_NO_ERROR;
3580         debug_print("messages list : %i\n", data->total);
3581
3582         while (cur != NULL) {
3583                 GSList * partial_result;
3584                 int count;
3585                 GSList * newlist;
3586                 GSList * llast;
3587
3588                 llast = NULL;
3589                 count = 0;
3590                 newlist = NULL;
3591                 while (count < MAX_MSG_NUM) {
3592                         void * p;
3593
3594                         p = cur->data;
3595
3596                         if (newlist == NULL)
3597                                 llast = newlist = g_slist_append(newlist, p);
3598                         else {
3599                                 llast = g_slist_append(llast, p);
3600                                 llast = llast->next;
3601                         }
3602                         count ++;
3603
3604                         cur = cur->next;
3605                         if (cur == NULL)
3606                                 break;
3607                 }
3608
3609                 data->done = FALSE;
3610                 data->session = session;
3611                 data->item = item;
3612                 data->numlist = newlist;
3613                 data->cur += count;
3614
3615                 if (prefs_common.work_offline &&
3616                     !inc_offline_should_override(FALSE,
3617                         _("Claws Mail needs network access in order "
3618                           "to access the IMAP server."))) {
3619                         g_free(data);
3620                         return NULL;
3621                 }
3622
3623                 partial_result =
3624                         (GSList *)imap_get_uncached_messages_thread(data);
3625                 *r = data->ok;
3626                 if (data->ok != MAILIMAP_NO_ERROR) {
3627                         goto bail;
3628                 }
3629                 statusbar_progress_all(data->cur,data->total, 1);
3630
3631                 g_slist_free(newlist);
3632
3633                 result = g_slist_concat(result, partial_result);
3634         }
3635 bail:
3636         g_free(data);
3637
3638         statusbar_progress_all(0,0,0);
3639         statusbar_pop_all();
3640
3641         return result;
3642 }
3643
3644 static void imap_delete_all_cached_messages(FolderItem *item)
3645 {
3646         gchar *dir;
3647
3648         g_return_if_fail(item != NULL);
3649         g_return_if_fail(item->folder != NULL);
3650         g_return_if_fail(FOLDER_CLASS(item->folder) == &imap_class);
3651
3652         debug_print("Deleting all cached messages...\n");
3653
3654         dir = folder_item_get_path(item);
3655         if (is_dir_exist(dir))
3656                 remove_all_numbered_files(dir);
3657         g_free(dir);
3658
3659         debug_print("done.\n");
3660 }
3661
3662 gchar imap_get_path_separator_for_item(FolderItem *item)
3663 {
3664         Folder *folder = NULL;
3665         IMAPFolder *imap_folder = NULL;
3666         IMAPSession *session = NULL;
3667         gchar result = '/';
3668         gint ok = MAILIMAP_NO_ERROR;
3669         if (!item)
3670                 return '/';
3671         folder = item->folder;
3672
3673         if (!folder)
3674                 return '/';
3675
3676         imap_folder = IMAP_FOLDER(folder);
3677
3678         debug_print("getting session...");
3679         session = imap_session_get(FOLDER(folder));
3680         result = imap_get_path_separator(session, imap_folder, item->path, &ok);
3681         return result;
3682 }
3683
3684 static gchar imap_refresh_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *subfolder, gint *ok)
3685 {
3686         clist * lep_list;
3687         int r;
3688         gchar separator = '\0';
3689
3690         g_return_val_if_fail(session != NULL, '/');
3691         r = imap_threaded_list((Folder *)folder, "", subfolder, &lep_list);
3692
3693         if (r != MAILIMAP_NO_ERROR) {
3694                 imap_handle_error(SESSION(session), NULL, r);
3695                 log_warning(LOG_PROTOCOL, _("LIST failed\n"));
3696                 *ok = r;
3697                 return '\0';
3698         }
3699
3700         if (lep_list != NULL && clist_count(lep_list) > 0) {
3701                 clistiter * iter = clist_begin(lep_list);
3702                 struct mailimap_mailbox_list * mb;
3703                 mb = clist_content(iter);
3704
3705                 separator = mb->mb_delimiter;
3706                 debug_print("got separator: %c\n", folder->last_seen_separator);
3707         }
3708         *ok = MAILIMAP_NO_ERROR;
3709         mailimap_list_result_free(lep_list);
3710         return separator;
3711 }
3712
3713 static gchar imap_get_path_separator(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3714 {
3715         gchar separator = '/';
3716         *ok = MAILIMAP_NO_ERROR;
3717         if (folder->last_seen_separator == 0) {
3718                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "", ok);
3719         }
3720
3721         if (folder->last_seen_separator == 0) {
3722                 folder->last_seen_separator = imap_refresh_path_separator(session, folder, "INBOX", ok);
3723         }
3724
3725         if (folder->last_seen_separator != 0) {
3726                 debug_print("using separator: %c\n", folder->last_seen_separator);
3727                 return folder->last_seen_separator;
3728         }
3729
3730         return separator;
3731 }
3732
3733 static gchar *imap_get_real_path(IMAPSession *session, IMAPFolder *folder, const gchar *path, gint *ok)
3734 {
3735         gchar *real_path = NULL;
3736         gchar separator;
3737
3738         g_return_val_if_fail(folder != NULL, NULL);
3739         g_return_val_if_fail(path != NULL, NULL);
3740
3741         *ok = MAILIMAP_NO_ERROR;
3742
3743         real_path = imap_utf8_to_modified_utf7(path, FALSE);
3744         separator = imap_get_path_separator(session, folder, path, ok);
3745         if (*ok == MAILIMAP_NO_ERROR)
3746                 imap_path_separator_subst(real_path, separator);
3747
3748         return real_path;
3749 }
3750
3751 static gint imap_set_message_flags(IMAPSession *session,
3752                                    IMAPFolderItem *item,
3753                                    MsgNumberList *numlist,
3754                                    IMAPFlags flags,
3755                                    GSList *tags,
3756                                    gboolean is_set)
3757 {
3758         gint ok = 0;
3759         GSList *seq_list;
3760         GSList * cur;
3761         gint total = 0;
3762         IMAPFolder *folder = NULL;
3763         GSList *sorted_list = NULL;
3764
3765         if (numlist == NULL || session == NULL)
3766                 return MAILIMAP_ERROR_BAD_STATE;
3767
3768         folder = IMAP_FOLDER(session->folder);
3769
3770         sorted_list = g_slist_copy(numlist);
3771         sorted_list = g_slist_sort(sorted_list, g_int_compare);
3772
3773         cur = g_slist_last(sorted_list);
3774
3775         if (cur)
3776                 total = GPOINTER_TO_INT(cur->data);
3777
3778         seq_list = imap_get_lep_set_from_numlist(IMAP_FOLDER(session->folder), sorted_list);
3779
3780         statusbar_print_all(_("Flagging messages..."));
3781
3782         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
3783                 struct mailimap_set * imapset = (struct mailimap_set *)cur->data;
3784                 struct mailimap_set_item *set_item = NULL;
3785
3786                 if (imapset->set_list)
3787                         set_item = clist_content(clist_begin(imapset->set_list));
3788                 else
3789                         continue;
3790
3791                 if (set_item == NULL)
3792                         continue;
3793
3794                 statusbar_progress_all(set_item->set_first, total, 1);
3795
3796                 ok = imap_cmd_store(session, item, imapset,
3797                                     flags, tags, is_set);
3798                 statusbar_progress_all(set_item->set_last, total, 1);
3799                 if (ok != MAILIMAP_NO_ERROR && folder->max_set_size > 20) {
3800                         /* reduce max set size */
3801                         folder->max_set_size /= 2;
3802                 }
3803                 if (ok != MAILIMAP_NO_ERROR && is_fatal(ok)) {
3804                         break;
3805                 }
3806         }
3807
3808         g_slist_free(sorted_list);
3809
3810         statusbar_progress_all(0,0,0);
3811         statusbar_pop_all();
3812
3813         imap_lep_set_free(seq_list);
3814
3815         return ok;
3816 }
3817
3818 typedef struct _select_data {
3819         IMAPSession *session;
3820         gchar *real_path;
3821         gint *exists;
3822         gint *recent;
3823         gint *unseen;
3824         guint32 *uid_validity;
3825         gboolean done;
3826 } select_data;
3827
3828 static gint imap_select(IMAPSession *session, IMAPFolder *folder,
3829                         FolderItem *item,
3830                         gint *exists, gint *recent, gint *unseen,
3831                         guint32 *uid_validity, gint *can_create_flags,
3832                         gboolean block)
3833 {
3834         gchar *real_path;
3835         gint ok = MAILIMAP_NO_ERROR;
3836         gint exists_, recent_, unseen_;
3837         guint32 uid_validity_;
3838         gint can_create_flags_;
3839         const gchar *path = item ? item->path:NULL;
3840
3841         if (!item) {
3842                 return MAILIMAP_ERROR_BAD_STATE;
3843         }
3844
3845         if (!exists && !recent && !unseen && !uid_validity && !can_create_flags) {
3846                 if (session->mbox && strcmp(session->mbox, path) == 0)
3847                         return MAILIMAP_NO_ERROR;
3848         }
3849         if (!exists && !recent && !unseen && !uid_validity && can_create_flags) {
3850                 if (session->mbox && strcmp(session->mbox, path) == 0) {
3851                         if (IMAP_FOLDER_ITEM(item)->can_create_flags != ITEM_CAN_CREATE_FLAGS_UNKNOWN)
3852                                 return MAILIMAP_NO_ERROR;
3853                 }
3854         }
3855         if (!exists)
3856                 exists = &exists_;
3857         if (!recent)
3858                 recent = &recent_;
3859         if (!unseen)
3860                 unseen = &unseen_;
3861         if (!uid_validity)
3862                 uid_validity = &uid_validity_;
3863         if (!can_create_flags)
3864                 can_create_flags = &can_create_flags_;
3865
3866         g_free(session->mbox);
3867         session->mbox = NULL;
3868         session->exists = 0;
3869         session->recent = 0;
3870         session->expunge = 0;
3871
3872         real_path = imap_get_real_path(session, folder, path, &ok);
3873         if (is_fatal(ok)) {
3874                 g_free(real_path);
3875                 return ok;
3876         }
3877         g_slist_free(IMAP_FOLDER_ITEM(item)->ok_flags);
3878         IMAP_FOLDER_ITEM(item)->ok_flags = NULL;
3879         ok = imap_cmd_select(session, real_path,
3880                              exists, recent, unseen, uid_validity, can_create_flags,
3881                              &(IMAP_FOLDER_ITEM(item)->ok_flags), block);
3882         if (ok != MAILIMAP_NO_ERROR) {
3883                 log_warning(LOG_PROTOCOL, _("can't select folder: %s\n"), real_path);
3884         } else {
3885                 session->mbox = g_strdup(path);
3886                 session->folder_content_changed = FALSE;
3887                 session->exists = *exists;
3888                 session->recent = *recent;
3889                 session->expunge = 0;
3890                 session->unseen = *unseen;
3891                 session->uid_validity = *uid_validity;
3892                 debug_print("select: exists %d recent %d expunge %d uid_validity %d can_create_flags %d\n",
3893                         session->exists, session->recent, session->expunge,
3894                         session->uid_validity, *can_create_flags);
3895         }
3896         if (*can_create_flags) {
3897                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CAN_CREATE_FLAGS;
3898         } else {
3899                 IMAP_FOLDER_ITEM(item)->can_create_flags = ITEM_CANNOT_CREATE_FLAGS;
3900         }
3901         g_free(real_path);
3902
3903         return ok;
3904 }
3905
3906 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
3907                         const gchar *path, IMAPFolderItem *item,
3908                         gint *messages,
3909                         guint32 *uid_next, guint32 *uid_validity,
3910                         gint *unseen, gboolean block)
3911 {
3912         int r = MAILIMAP_NO_ERROR;
3913         clistiter * iter;
3914         struct mailimap_mailbox_data_status * data_status;
3915         int got_values;
3916         gchar *real_path;
3917         guint mask = 0;
3918
3919         real_path = imap_get_real_path(session, folder, path, &r);
3920         if (is_fatal(r)) {
3921                 g_free(real_path);
3922                 return r;
3923         }
3924         if (messages) {
3925                 mask |= 1 << 0;
3926                 *messages = 0;
3927         }
3928         if (uid_next) {
3929                 mask |= 1 << 2;
3930                 *uid_next = 0;
3931         }
3932         if (uid_validity) {
3933                 mask |= 1 << 3;
3934                 *uid_validity = 0;
3935         }
3936         if (unseen) {
3937                 mask |= 1 << 4;
3938                 *unseen = 0;
3939         }
3940
3941         if (session->mbox != NULL &&
3942             !strcmp(session->mbox, item->item.path)) {
3943                 r = imap_cmd_close(session);
3944                 if (r != MAILIMAP_NO_ERROR) {
3945                         debug_print("close err %d\n", r);
3946                         g_free(real_path);
3947                         return r;
3948                 }
3949         }
3950
3951         r = imap_threaded_status(FOLDER(folder), real_path,
3952                 &data_status, mask);
3953
3954         g_free(real_path);
3955         if (r != MAILIMAP_NO_ERROR) {
3956                 imap_handle_error(SESSION(session), NULL, r);
3957                 debug_print("status err %d\n", r);
3958                 return r;
3959         }
3960
3961         if (data_status == NULL || data_status->st_info_list == NULL) {
3962                 debug_print("data_status %p\n", data_status);
3963                 if (data_status) {
3964                         debug_print("data_status->st_info_list %p\n", data_status->st_info_list);
3965                         mailimap_mailbox_data_status_free(data_status);
3966                 }
3967                 return MAILIMAP_ERROR_BAD_STATE;
3968         }
3969
3970         got_values = 0;
3971         if (data_status->st_info_list) {
3972                 for(iter = clist_begin(data_status->st_info_list) ; iter != NULL ;
3973                     iter = clist_next(iter)) {
3974                         struct mailimap_status_info * info;
3975
3976                         info = clist_content(iter);
3977                         switch (info->st_att) {
3978                         case MAILIMAP_STATUS_ATT_MESSAGES:
3979                                 if (messages) {
3980                                         * messages = info->st_value;
3981                                         got_values |= 1 << 0;
3982                                 }
3983                                 break;
3984
3985                         case MAILIMAP_STATUS_ATT_UIDNEXT:
3986                                 if (uid_next) {
3987                                         * uid_next = info->st_value;
3988                                         got_values |= 1 << 2;
3989                                 }
3990                                 break;
3991
3992                         case MAILIMAP_STATUS_ATT_UIDVALIDITY:
3993                                 if (uid_validity) {
3994                                         * uid_validity = info->st_value;
3995                                         got_values |= 1 << 3;
3996                                 }
3997                                 break;
3998
3999                         case MAILIMAP_STATUS_ATT_UNSEEN:
4000                                 if (unseen) {
4001                                         * unseen = info->st_value;
4002                                         got_values |= 1 << 4;
4003                                 }
4004                                 break;
4005                         }
4006                 }
4007         }
4008         mailimap_mailbox_data_status_free(data_status);
4009
4010         if (got_values != mask) {
4011                 g_warning("status: incomplete values received (%d)\n", got_values);
4012         }
4013         return MAILIMAP_NO_ERROR;
4014 }
4015
4016 static void imap_free_capabilities(IMAPSession *session)
4017 {
4018         slist_free_strings_full(session->capability);
4019         session->capability = NULL;
4020 }
4021
4022 /* low-level IMAP4rev1 commands */
4023
4024 static gint imap_cmd_login(IMAPSession *session,
4025                            const gchar *user, const gchar *pass,
4026                            const gchar *type)
4027 {
4028         int r;
4029         gint ok;
4030
4031         if (!strcmp(type, "LOGIN") && imap_has_capability(session, "LOGINDISABLED")) {
4032                 gint ok = MAILIMAP_ERROR_BAD_STATE;
4033                 if (imap_has_capability(session, "STARTTLS")) {
4034 #ifdef USE_GNUTLS
4035                         log_warning(LOG_PROTOCOL, _("Server requires TLS to log in.\n"));
4036                         ok = imap_cmd_starttls(session);
4037                         if (ok != MAILIMAP_NO_ERROR) {
4038                                 log_warning(LOG_PROTOCOL, _("Can't start TLS session.\n"));
4039                                 return ok;
4040                         } else {
4041                                 /* refresh capas */
4042                                 imap_free_capabilities(session);
4043                                 if ((r = imap_get_capabilities(session)) != MAILIMAP_NO_ERROR) {
4044                                         imap_handle_error(SESSION(session), NULL, r);
4045                                         log_warning(LOG_PROTOCOL, _("Can't refresh capabilities.\n"));
4046                                         return r;
4047                                 }
4048                         }
4049 #else
4050                         log_error(LOG_PROTOCOL, _("Connection to %s failed: "
4051                                         "server requires TLS, but Claws Mail "
4052                                         "has been compiled without OpenSSL "
4053                                         "support.\n"),
4054                                         SESSION(session)->server);
4055                         return MAILIMAP_ERROR_LOGIN;
4056 #endif
4057                 } else {
4058                         log_error(LOG_PROTOCOL, _("Server logins are disabled.\n"));
4059                         return MAILIMAP_ERROR_LOGIN;
4060                 }
4061         }
4062
4063         log_print(LOG_PROTOCOL, "IMAP4> Logging %s to %s using %s\n",
4064                         user,
4065                         SESSION(session)->server,
4066                         type);
4067         r = imap_threaded_login(session->folder, user, pass, type);
4068         if (r != MAILIMAP_NO_ERROR) {
4069                 imap_handle_error(SESSION(session), NULL, r);
4070                 log_print(LOG_PROTOCOL, "IMAP4< Error logging in to %s\n",
4071                                 SESSION(session)->server);
4072                 ok = r;
4073         } else {
4074                 log_print(LOG_PROTOCOL, "IMAP4< Login to %s successful\n",
4075                                 SESSION(session)->server);
4076                 ok = MAILIMAP_NO_ERROR;
4077         }
4078         return ok;
4079 }
4080
4081 static gint imap_cmd_noop(IMAPSession *session)
4082 {
4083         int r;
4084         unsigned int exists, recent, expunge, unseen, uidnext, uidval;
4085
4086         r = imap_threaded_noop(session->folder, &exists, &recent, &expunge, &unseen, &uidnext, &uidval);
4087         if (r != MAILIMAP_NO_ERROR) {
4088                 imap_handle_error(SESSION(session), NULL, r);
4089                 debug_print("noop err %d\n", r);
4090                 return r;
4091         }
4092
4093         if ((exists && exists != session->exists)
4094          || (recent && recent != session->recent)
4095          || (expunge && expunge != session->expunge)
4096          || (unseen && unseen != session->unseen)) {
4097                 session->folder_content_changed = TRUE;
4098         }
4099         if (uidnext != 0 && uidnext != session->uid_next) {
4100                 session->uid_next = uidnext;
4101                 session->folder_content_changed = TRUE;
4102         }
4103         if (uidval != 0 && uidval != session->uid_validity) {
4104                 session->uid_validity = uidval;
4105                 session->folder_content_changed = TRUE;
4106         }
4107
4108         session->exists = exists;
4109         session->recent = recent;
4110         session->expunge = expunge;
4111         session->unseen = unseen;
4112
4113         session_set_access_time(SESSION(session));
4114
4115         return MAILIMAP_NO_ERROR;
4116 }
4117
4118 #ifdef USE_GNUTLS
4119 static gint imap_cmd_starttls(IMAPSession *session)
4120 {
4121         int r;
4122
4123         r = imap_threaded_starttls(session->folder,
4124                 SESSION(session)->server, SESSION(session)->port);
4125         if (r != MAILIMAP_NO_ERROR) {
4126                 imap_handle_error(SESSION(session), NULL, r);
4127                 debug_print("starttls err %d\n", r);
4128                 return r;
4129         }
4130         return MAILIMAP_NO_ERROR;
4131 }
4132 #endif
4133
4134 static gint imap_cmd_select(IMAPSession *session, const gchar *folder,
4135                             gint *exists, gint *recent, gint *unseen,
4136                             guint32 *uid_validity, gint *can_create_flags,
4137                             GSList **ok_flags, gboolean block)
4138 {
4139         int r;
4140
4141         r = imap_threaded_select(session->folder, folder,
4142                                  exists, recent, unseen, uid_validity, can_create_flags, ok_flags);
4143         if (r != MAILIMAP_NO_ERROR) {
4144                 imap_handle_error(SESSION(session), NULL, r);
4145                 debug_print("select err %d\n", r);
4146                 return r;
4147         }
4148         return MAILIMAP_NO_ERROR;
4149 }
4150
4151 static gint imap_cmd_close(IMAPSession *session)
4152 {
4153         int r;
4154
4155         r = imap_threaded_close(session->folder);
4156         if (r != MAILIMAP_NO_ERROR) {
4157                 imap_handle_error(SESSION(session), NULL, r);
4158                 debug_print("close err %d\n", r);
4159                 return r;
4160         }
4161         g_free(session->mbox);
4162         session->mbox = NULL;
4163         session->exists = 0;
4164         session->recent = 0;
4165         session->expunge = 0;
4166         return MAILIMAP_NO_ERROR;
4167 }
4168
4169 static gint imap_cmd_examine(IMAPSession *session, const gchar *folder,
4170                              gint *exists, gint *recent, gint *unseen,
4171                              guint32 *uid_validity, gboolean block)
4172 {
4173         int r;
4174
4175         r = imap_threaded_examine(session->folder, folder,
4176                                   exists, recent, unseen, uid_validity);
4177         if (r != MAILIMAP_NO_ERROR) {
4178                 imap_handle_error(SESSION(session), NULL, r);
4179                 debug_print("examine err %d\n", r);
4180
4181                 return r;
4182         }
4183         return MAILIMAP_NO_ERROR;
4184 }
4185
4186 static gint imap_cmd_create(IMAPSession *session, const gchar *folder)
4187 {
4188         int r;
4189
4190         r = imap_threaded_create(session->folder, folder);
4191         if (r != MAILIMAP_NO_ERROR) {
4192                 imap_handle_error(SESSION(session), NULL, r);
4193                 return r;
4194         }
4195
4196         return MAILIMAP_NO_ERROR;
4197 }
4198
4199 static gint imap_cmd_rename(IMAPSession *session, const gchar *old_folder,
4200                             const gchar *new_folder)
4201 {
4202         int r;
4203
4204         r = imap_threaded_rename(session->folder, old_folder,
4205                                  new_folder);
4206         if (r != MAILIMAP_NO_ERROR) {
4207                 imap_handle_error(SESSION(session), NULL, r);
4208                 return r;
4209         }
4210
4211         return MAILIMAP_NO_ERROR;
4212 }
4213
4214 static gint imap_cmd_delete(IMAPSession *session, const gchar *folder)
4215 {
4216         int r;
4217
4218
4219         r = imap_threaded_delete(session->folder, folder);
4220         if (r != MAILIMAP_NO_ERROR) {
4221                 imap_handle_error(SESSION(session), NULL, r);
4222                 return r;
4223         }
4224
4225         return MAILIMAP_NO_ERROR;
4226 }
4227
4228 typedef struct _fetch_data {
4229         IMAPSession *session;
4230         guint32 uid;
4231         const gchar *filename;
4232         gboolean headers;
4233         gboolean body;
4234         gboolean done;
4235 } fetch_data;
4236
4237 static void *imap_cmd_fetch_thread(void *data)
4238 {
4239         fetch_data *stuff = (fetch_data *)data;
4240         IMAPSession *session = stuff->session;
4241         guint32 uid = stuff->uid;
4242         const gchar *filename = stuff->filename;
4243         int r;
4244
4245         if (stuff->body) {
4246                 r = imap_threaded_fetch_content(session->folder,
4247                                                uid, 1, filename);
4248         }
4249         else {
4250                 r = imap_threaded_fetch_content(session->folder,
4251                                                 uid, 0, filename);
4252         }
4253         if (r != MAILIMAP_NO_ERROR) {
4254                 imap_handle_error(SESSION(session), NULL, r);
4255                 debug_print("fetch err %d\n", r);
4256                 return GINT_TO_POINTER(r);
4257         }
4258         return GINT_TO_POINTER(MAILIMAP_NO_ERROR);
4259 }
4260
4261 static gint imap_cmd_fetch(IMAPSession *session, guint32 uid,
4262                                 const gchar *filename, gboolean headers,
4263                                 gboolean body)
4264 {
4265         fetch_data *data = g_new0(fetch_data, 1);
4266         int result = 0;
4267         data->done = FALSE;
4268         data->session = session;
4269         data->uid = uid;
4270         data->filename = filename;
4271         data->headers = headers;
4272         data->body = body;
4273
4274         if (prefs_common.work_offline &&
4275             !inc_offline_should_override(FALSE,
4276                 _("Claws Mail needs network access in order "
4277                   "to access the IMAP server."))) {
4278                 g_free(data);
4279                 return -1;
4280         }
4281         statusbar_print_all(_("Fetching message..."));
4282         result = GPOINTER_TO_INT(imap_cmd_fetch_thread(data));
4283         statusbar_pop_all();
4284         g_free(data);
4285         return result;
4286 }
4287
4288
4289 static gint imap_cmd_append(IMAPSession *session,
4290                             IMAPFolderItem *item,
4291                             const gchar *destfolder,
4292                             const gchar *file, IMAPFlags flags,
4293                             guint32 *new_uid)
4294 {
4295         struct mailimap_flag_list * flag_list;
4296         int r;
4297
4298         cm_return_val_if_fail(file != NULL, MAILIMAP_ERROR_BAD_STATE);
4299
4300         flag_list = imap_flag_to_lep(item, flags, NULL);
4301         lock_session(session);
4302         r = imap_threaded_append(session->folder, destfolder,
4303                          file, flag_list, (int *)new_uid);
4304         mailimap_flag_list_free(flag_list);
4305
4306         if (r != MAILIMAP_NO_ERROR) {
4307                 imap_handle_error(SESSION(session), NULL, r);
4308                 debug_print("append err %d\n", r);
4309                 return r;
4310         }
4311
4312         unlock_session(session);
4313
4314         return MAILIMAP_NO_ERROR;
4315 }
4316
4317 static gint imap_cmd_copy(IMAPSession *session, struct mailimap_set * set,
4318                           const gchar *destfolder,
4319                           struct mailimap_set **source, struct mailimap_set **dest)
4320 {
4321         int r;
4322
4323         g_return_val_if_fail(session != NULL, MAILIMAP_ERROR_BAD_STATE);
4324         g_return_val_if_fail(set != NULL, MAILIMAP_ERROR_BAD_STATE);
4325         g_return_val_if_fail(destfolder != NULL, MAILIMAP_ERROR_BAD_STATE);
4326
4327         r = imap_threaded_copy(session->folder, set, destfolder, source, dest);
4328         if (r != MAILIMAP_NO_ERROR) {
4329                 imap_handle_error(SESSION(session), NULL, r);
4330                 return r;
4331         }
4332
4333         return MAILIMAP_NO_ERROR;
4334 }
4335
4336 static gint imap_cmd_store(IMAPSession *session,
4337                            IMAPFolderItem *item,
4338                            struct mailimap_set * set,
4339                            IMAPFlags flags, GSList *tags, int do_add)
4340 {
4341         int r;
4342         struct mailimap_flag_list * flag_list = NULL;
4343         struct mailimap_store_att_flags * store_att_flags;
4344
4345         flag_list = imap_flag_to_lep(item, flags, tags);
4346
4347         if (do_add)
4348                 store_att_flags =
4349                         mailimap_store_att_flags_new_add_flags_silent(flag_list);
4350         else
4351                 store_att_flags =
4352                         mailimap_store_att_flags_new_remove_flags_silent(flag_list);
4353
4354         r = imap_threaded_store(session->folder, set, store_att_flags);
4355         mailimap_store_att_flags_free(store_att_flags);
4356         if (r != MAILIMAP_NO_ERROR) {
4357                 imap_handle_error(SESSION(session), NULL, r);
4358                 return r;
4359         }
4360
4361         return MAILIMAP_NO_ERROR;
4362 }
4363
4364 static gint imap_cmd_expunge(IMAPSession *session, gboolean do_expunge)
4365 {
4366         int r;
4367
4368         if (!do_expunge)
4369                 return MAILIMAP_NO_ERROR;
4370
4371         if (prefs_common.work_offline &&
4372             !inc_offline_should_override(FALSE,
4373                 _("Claws Mail needs network access in order "
4374                   "to access the IMAP server."))) {
4375                 return -1;
4376         }
4377
4378         r = imap_threaded_expunge(session->folder);
4379         if (r != MAILIMAP_NO_ERROR) {
4380                 imap_handle_error(SESSION(session), NULL, r);
4381                 return r;
4382         }
4383
4384         return MAILIMAP_NO_ERROR;
4385 }
4386
4387 gint imap_expunge(Folder *folder, FolderItem *item)
4388 {
4389         IMAPSession *session = imap_session_get(folder);
4390         if (session == NULL)
4391                 return -1;
4392
4393         return imap_cmd_expunge(session, TRUE);
4394 }
4395
4396 static void imap_path_separator_subst(gchar *str, gchar separator)
4397 {
4398         gchar *p;
4399         gboolean in_escape = FALSE;
4400
4401         if (!separator || separator == '/') return;
4402
4403         for (p = str; *p != '\0'; p++) {
4404                 if (*p == '/' && !in_escape)
4405                         *p = separator;
4406                 else if (*p == '&' && *(p + 1) != '-' && !in_escape)
4407                         in_escape = TRUE;
4408                 else if (*p == '-' && in_escape)
4409                         in_escape = FALSE;
4410         }
4411 }
4412
4413 static gboolean imap_rename_folder_func(GNode *node, gpointer data)
4414 {
4415         FolderItem *item = node->data;
4416         gchar **paths = data;
4417         const gchar *oldpath = paths[0];
4418         const gchar *newpath = paths[1];
4419         gchar *real_oldpath, *real_newpath;
4420         gchar *base;
4421         gchar *new_itempath;
4422         gint oldpathlen;
4423         IMAPSession *session = imap_session_get(item->folder);
4424         gint ok = MAILIMAP_NO_ERROR;
4425         oldpathlen = strlen(oldpath);
4426         if (strncmp(oldpath, item->path, oldpathlen) != 0) {
4427                 g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
4428                 return TRUE;
4429         }
4430
4431         base = item->path + oldpathlen;
4432         while (*base == G_DIR_SEPARATOR) base++;
4433         if (*base == '\0')
4434                 new_itempath = g_strdup(newpath);
4435         else
4436                 new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
4437                                            NULL);
4438
4439         real_oldpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4440         g_free(item->path);
4441         item->path = new_itempath;
4442
4443         real_newpath = imap_get_real_path(session, IMAP_FOLDER(item->folder), item->path, &ok);
4444
4445         imap_threaded_subscribe(item->folder, real_oldpath, FALSE);
4446         imap_threaded_subscribe(item->folder, real_newpath, TRUE);
4447
4448         g_free(real_oldpath);
4449         g_free(real_newpath);
4450         return FALSE;
4451 }
4452
4453 static gint get_list_of_uids(IMAPSession *session, Folder *folder, IMAPFolderItem *item, GSList **msgnum_list)
4454 {
4455         GSList *uidlist, *elem;
4456         int r = -1;
4457         clist * lep_uidlist;
4458         gint ok, nummsgs = 0;
4459
4460         if (session == NULL) {
4461                 return -1;
4462         }
4463
4464         ok = imap_select(session, IMAP_FOLDER(folder), FOLDER_ITEM(item),
4465                          NULL, NULL, NULL, NULL, NULL, TRUE);
4466         if (ok != MAILIMAP_NO_ERROR) {
4467                 return -1;
4468         }
4469
4470         g_slist_free(item->uid_list);
4471         item->uid_list = NULL;
4472
4473         uidlist = NULL;
4474
4475         if (folder->account && folder->account->low_bandwidth) {
4476                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SIMPLE,
4477                                 NULL, NULL, NULL, &lep_uidlist);
4478         }
4479
4480         if (r == MAILIMAP_NO_ERROR) {
4481                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
4482                 mailimap_search_result_free(lep_uidlist);
4483         } else {
4484                 carray * lep_uidtab;
4485                 if (r != -1) { /* inited */
4486                         imap_handle_error(SESSION(session), NULL, r);
4487                         if (is_fatal(r))
4488                                 return -1;
4489                 }
4490                 r = imap_threaded_fetch_uid(folder, 1,
4491                                     &lep_uidtab);
4492                 if (r == MAILIMAP_NO_ERROR) {
4493                         uidlist = imap_uid_list_from_lep_tab(lep_uidtab);
4494                         imap_fetch_uid_list_free(lep_uidtab);
4495                 }
4496         }
4497
4498         if (r != MAILIMAP_NO_ERROR) {
4499                 imap_handle_error(SESSION(session), NULL, r);
4500                 return -1;
4501         }
4502
4503         for (elem = uidlist; elem != NULL; elem = g_slist_next(elem)) {
4504                 guint msgnum;
4505
4506                 msgnum = GPOINTER_TO_INT(elem->data);
4507
4508                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(msgnum));
4509                 item->uid_list = g_slist_prepend(item->uid_list, GINT_TO_POINTER(msgnum));
4510                 nummsgs++;
4511         }
4512         g_slist_free(uidlist);
4513
4514         unlock_session(session); /* locked from imap_get_num_list */
4515
4516         return nummsgs;
4517
4518 }
4519
4520 gint imap_get_num_list(Folder *folder, FolderItem *_item, GSList **msgnum_list, gboolean *old_uids_valid)
4521 {
4522         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4523         IMAPSession *session;
4524         gint nummsgs;
4525         GSList *uidlist = NULL;
4526         gchar *dir;
4527         gint known_list_len = 0;
4528         gchar *path;
4529
4530         debug_print("get_num_list\n");
4531
4532         g_return_val_if_fail(folder != NULL, -1);
4533         g_return_val_if_fail(item != NULL, -1);
4534         g_return_val_if_fail(item->item.path != NULL, -1);
4535         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4536         g_return_val_if_fail(folder->account != NULL, -1);
4537
4538         known_list_len = g_slist_length(item->uid_list);
4539         if (!item->should_update) {
4540                 debug_print("get_num_list: nothing to update\n");
4541                 *old_uids_valid = TRUE;
4542                 if (known_list_len == item->item.total_msgs
4543                  && known_list_len > 0) {
4544                         *msgnum_list = g_slist_copy(item->uid_list);
4545                         return known_list_len;
4546                 } else {
4547                         debug_print("don't know the list length...\n");
4548                 }
4549         }
4550
4551         if (prefs_common.work_offline &&
4552             !inc_offline_should_override(FALSE,
4553                 _("Claws Mail needs network access in order "
4554                   "to access the IMAP server."))) {
4555                 return -1;
4556         }
4557
4558         path = folder_item_get_path(_item);
4559         if (!is_dir_exist(path)) {
4560                 if(is_file_exist(path))
4561                         claws_unlink(path);
4562                 make_dir_hier(path);
4563         }
4564         g_free(path);
4565
4566         debug_print("getting session...\n");
4567         session = imap_session_get(folder);
4568         g_return_val_if_fail(session != NULL, -1);
4569
4570         lock_session(session); /* unlocked by get_list_of_uids */
4571         if (FOLDER_ITEM(item)->path)
4572                 statusbar_print_all(_("Scanning folder %s%c%s..."),
4573                                       FOLDER_ITEM(item)->folder->name,
4574                                       G_DIR_SEPARATOR,
4575                                       FOLDER_ITEM(item)->path);
4576         else
4577                 statusbar_print_all(_("Scanning folder %s..."),
4578                                       FOLDER_ITEM(item)->folder->name);
4579
4580         if (item->should_trash_cache) {
4581                 *old_uids_valid = FALSE;
4582                 debug_print("get_num_list: trashing num list\n");
4583                 debug_print("Freeing imap uid cache\n");
4584                 item->lastuid = 0;
4585                 g_slist_free(item->uid_list);
4586                 item->uid_list = NULL;
4587
4588                 imap_delete_all_cached_messages((FolderItem *)item);
4589         } else {
4590                 debug_print("get_num_list: updating num list\n");
4591                 *old_uids_valid = TRUE;
4592         }
4593
4594         nummsgs = get_list_of_uids(session, folder, item, &uidlist);
4595         /* session could be broken now, in case of fatal error */
4596
4597         debug_print("get_num_list: got %d msgs\n", nummsgs);
4598
4599         if (nummsgs < 0) {
4600                 statusbar_pop_all();
4601                 return -1;
4602         }
4603
4604         *msgnum_list = uidlist;
4605
4606         dir = folder_item_get_path((FolderItem *)item);
4607         debug_print("removing old messages from %s\n", dir);
4608         remove_numbered_files_not_in_list(dir, *msgnum_list);
4609         g_free(dir);
4610
4611         debug_print("get_num_list - ok - %i\n", nummsgs);
4612         statusbar_pop_all();
4613         item->should_trash_cache = FALSE;
4614         item->should_update = FALSE;
4615         return nummsgs;
4616 }
4617
4618 static MsgInfo *imap_parse_msg(const gchar *file, FolderItem *item)
4619 {
4620         MsgInfo *msginfo;
4621         MsgFlags flags;
4622
4623         flags.perm_flags = MSG_NEW|MSG_UNREAD;
4624         flags.tmp_flags = 0;
4625
4626         g_return_val_if_fail(item != NULL, NULL);
4627         g_return_val_if_fail(file != NULL, NULL);
4628
4629         if (folder_has_parent_of_type(item, F_QUEUE)) {
4630                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
4631         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
4632                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
4633         }
4634
4635         msginfo = procheader_parse_file(file, flags, FALSE, FALSE);
4636         if (!msginfo) return NULL;
4637
4638         msginfo->plaintext_file = g_strdup(file);
4639         msginfo->folder = item;
4640
4641         return msginfo;
4642 }
4643
4644 GSList *imap_get_msginfos(Folder *folder, FolderItem *item,
4645                           GSList *msgnum_list)
4646 {
4647         IMAPSession *session;
4648         MsgInfoList *ret = NULL;
4649         gint ok;
4650
4651         debug_print("get_msginfos\n");
4652
4653         g_return_val_if_fail(folder != NULL, NULL);
4654         g_return_val_if_fail(item != NULL, NULL);
4655         g_return_val_if_fail(msgnum_list != NULL, NULL);
4656
4657         debug_print("getting session...\n");
4658         session = imap_session_get(folder);
4659         g_return_val_if_fail(session != NULL, NULL);
4660
4661         lock_session(session); /* unlocked later in the function */
4662
4663         debug_print("IMAP getting msginfos\n");
4664         ok = imap_select(session, IMAP_FOLDER(folder), item,
4665                          NULL, NULL, NULL, NULL, NULL, FALSE);
4666         if (ok != MAILIMAP_NO_ERROR) {
4667                 return NULL;
4668         }
4669         if (!(folder_has_parent_of_type(item, F_DRAFT) ||
4670               folder_has_parent_of_type(item, F_QUEUE))) {
4671                 ret = g_slist_concat(ret,
4672                         imap_get_uncached_messages(session, item,
4673                                                    msgnum_list, &ok));
4674                 if (ok != MAILIMAP_NO_ERROR)
4675                         return NULL;
4676                 unlock_session(session);
4677         } else {
4678                 MsgNumberList *sorted_list, *elem, *llast = NULL;
4679                 gint startnum, lastnum;
4680
4681                 unlock_session(session);
4682
4683                 sorted_list = g_slist_sort(g_slist_copy(msgnum_list), g_int_compare);
4684
4685                 startnum = lastnum = GPOINTER_TO_INT(sorted_list->data);
4686
4687                 llast = g_slist_last(ret);
4688                 for (elem = sorted_list;; elem = g_slist_next(elem)) {
4689                         guint num = 0;
4690
4691                         if (elem)
4692                                 num = GPOINTER_TO_INT(elem->data);
4693
4694                         if (num > lastnum + 1 || elem == NULL) {
4695                                 int i;
4696                                 for (i = startnum; i <= lastnum; ++i) {
4697                                         gchar *file;
4698                                         file = imap_fetch_msg(folder, item, i);
4699                                         if (file != NULL) {
4700                                                 MsgInfo *msginfo = imap_parse_msg(file, item);
4701                                                 if (msginfo != NULL) {
4702                                                         msginfo->msgnum = i;
4703                                                         if (llast == NULL)
4704                                                                 llast = ret = g_slist_append(ret, msginfo);
4705                                                         else {
4706                                                                 llast = g_slist_append(llast, msginfo);
4707                                                                 llast = llast->next;
4708                                                         }
4709                                                 }
4710                                                 g_free(file);
4711                                         }
4712                                 }
4713
4714                                 if (elem == NULL)
4715                                         break;
4716
4717                                 startnum = num;
4718                         }
4719                         lastnum = num;
4720                 }
4721
4722                 g_slist_free(sorted_list);
4723         }
4724         return ret;
4725 }
4726
4727 MsgInfo *imap_get_msginfo(Folder *folder, FolderItem *item, gint uid)
4728 {
4729         MsgInfo *msginfo = NULL;
4730         MsgInfoList *msginfolist;
4731         MsgNumberList numlist;
4732
4733         numlist.next = NULL;
4734         numlist.data = GINT_TO_POINTER(uid);
4735
4736         msginfolist = imap_get_msginfos(folder, item, &numlist);
4737         if (msginfolist != NULL) {
4738                 msginfo = msginfolist->data;
4739                 g_slist_free(msginfolist);
4740         }
4741
4742         return msginfo;
4743 }
4744
4745 gboolean imap_scan_required(Folder *folder, FolderItem *_item)
4746 {
4747         IMAPSession *session;
4748         IMAPFolderItem *item = (IMAPFolderItem *)_item;
4749         gint ok, exists = 0, unseen = 0;
4750         guint32 uid_next = 0, uid_val = 0;
4751         gboolean selected_folder;
4752
4753         g_return_val_if_fail(folder != NULL, FALSE);
4754         g_return_val_if_fail(item != NULL, FALSE);
4755         g_return_val_if_fail(item->item.folder != NULL, FALSE);
4756         g_return_val_if_fail(FOLDER_CLASS(item->item.folder) == &imap_class, FALSE);
4757
4758         if (item->item.path == NULL)
4759                 return FALSE;
4760
4761         if (item->should_update) {
4762                 debug_print("scan already required\n");
4763                 return TRUE;
4764         }
4765         debug_print("getting session...\n");
4766         session = imap_session_get(folder);
4767
4768         g_return_val_if_fail(session != NULL, FALSE);
4769         lock_session(session); /* unlocked later in the function */
4770
4771         selected_folder = (session->mbox != NULL) &&
4772                           (!strcmp(session->mbox, item->item.path));
4773         if (selected_folder) {
4774                 if (!session->folder_content_changed) {
4775                         ok = imap_cmd_noop(session);
4776                         if (ok != MAILIMAP_NO_ERROR) {
4777                                 debug_print("disconnected!\n");
4778                                 if (!is_fatal(ok))
4779                                         session = imap_reconnect_if_possible(folder, session);
4780                                 else
4781                                         session = imap_session_get(folder);
4782                                 if (session == NULL)
4783                                         return FALSE;
4784                         }
4785
4786                         if (session->folder_content_changed) {
4787                                 debug_print("CHANGED (self-noop)! scan_required\n");
4788                                 item->should_update = TRUE;
4789                                 if (session->uid_validity && session->uid_validity != item->item.mtime) {
4790                                         item->item.mtime = session->uid_validity;
4791                                         item->should_trash_cache = TRUE;
4792                                 }
4793                                 unlock_session(session);
4794                                 return TRUE;
4795                         }
4796                 } else {
4797                         debug_print("CHANGED (previous noop)! scan_required\n");
4798                         item->should_update = TRUE;
4799                         if (session->uid_validity && session->uid_validity != item->item.mtime) {
4800                                 item->item.mtime = session->uid_validity;
4801                                 item->should_trash_cache = TRUE;
4802                         }
4803                         unlock_session(session);
4804                         return TRUE;
4805                 }
4806         } else {
4807                 ok = imap_status(session, IMAP_FOLDER(folder), item->item.path, IMAP_FOLDER_ITEM(item),
4808                                  &exists, &uid_next, &uid_val, &unseen, FALSE);
4809                 if (ok != MAILIMAP_NO_ERROR) {
4810                         return FALSE;
4811                 }
4812
4813                 debug_print("exists %d, item->item.total_msgs %d\n",
4814                         exists, item->item.total_msgs);
4815                 if (exists != item->item.total_msgs
4816                     || unseen != item->item.unread_msgs
4817                     || uid_next != item->uid_next
4818                     || uid_val != item->item.mtime) {
4819                         debug_print("CHANGED (status)! scan_required\n");
4820                         item->last_change = time(NULL);
4821                         item->should_update = TRUE;
4822                         item->uid_next = uid_next;
4823                         if (uid_val != item->item.mtime) {
4824                                 item->item.mtime = uid_val;
4825                                 item->should_trash_cache = TRUE;
4826                         }
4827                         unlock_session(session);
4828                         return TRUE;
4829                 }
4830         }
4831         unlock_session(session);
4832
4833         item->should_update = FALSE;
4834         return FALSE;
4835 }
4836
4837 void imap_change_flags(Folder *folder, FolderItem *item, MsgInfo *msginfo, MsgPermFlags newflags)
4838 {
4839         IMAPSession *session;
4840         IMAPFlags flags_set = 0, flags_unset = 0;
4841         gint ok = MAILIMAP_NO_ERROR;
4842         MsgNumberList numlist;
4843         hashtable_data *ht_data = NULL;
4844
4845         g_return_if_fail(folder != NULL);
4846         g_return_if_fail(folder->klass == &imap_class);
4847         g_return_if_fail(item != NULL);
4848         g_return_if_fail(item->folder == folder);
4849         g_return_if_fail(msginfo != NULL);
4850         g_return_if_fail(msginfo->folder == item);
4851
4852         if (!MSG_IS_MARKED(msginfo->flags) &&  (newflags & MSG_MARKED))
4853                 flags_set |= IMAP_FLAG_FLAGGED;
4854         if ( MSG_IS_MARKED(msginfo->flags) && !(newflags & MSG_MARKED))
4855                 flags_unset |= IMAP_FLAG_FLAGGED;
4856
4857         if (!MSG_IS_UNREAD(msginfo->flags) &&  (newflags & MSG_UNREAD))
4858                 flags_unset |= IMAP_FLAG_SEEN;
4859         if ( MSG_IS_UNREAD(msginfo->flags) && !(newflags & MSG_UNREAD))
4860                 flags_set |= IMAP_FLAG_SEEN;
4861
4862         if (!MSG_IS_REPLIED(msginfo->flags) &&  (newflags & MSG_REPLIED))
4863                 flags_set |= IMAP_FLAG_ANSWERED;
4864         if ( MSG_IS_REPLIED(msginfo->flags) && !(newflags & MSG_REPLIED))
4865                 flags_unset |= IMAP_FLAG_ANSWERED;
4866
4867         if (!MSG_IS_FORWARDED(msginfo->flags) &&  (newflags & MSG_FORWARDED))
4868                 flags_set |= IMAP_FLAG_FORWARDED;
4869         if ( MSG_IS_FORWARDED(msginfo->flags) && !(newflags & MSG_FORWARDED))
4870                 flags_unset |= IMAP_FLAG_FORWARDED;
4871
4872         if (!MSG_IS_SPAM(msginfo->flags) &&  (newflags & MSG_SPAM)) {
4873                 flags_set |= IMAP_FLAG_SPAM;
4874                 flags_unset |= IMAP_FLAG_HAM;
4875         }
4876         if ( MSG_IS_SPAM(msginfo->flags) && !(newflags & MSG_SPAM)) {
4877                 flags_set |= IMAP_FLAG_HAM;
4878                 flags_unset |= IMAP_FLAG_SPAM;
4879         }
4880         if (!MSG_IS_DELETED(msginfo->flags) &&  (newflags & MSG_DELETED))
4881                 flags_set |= IMAP_FLAG_DELETED;
4882         if ( MSG_IS_DELETED(msginfo->flags) && !(newflags & MSG_DELETED))
4883                 flags_unset |= IMAP_FLAG_DELETED;
4884
4885         if (!flags_set && !flags_unset) {
4886                 /* the changed flags were not translatable to IMAP-speak.
4887                  * like MSG_POSTFILTERED, so just apply. */
4888                 msginfo->flags.perm_flags = newflags;
4889                 return;
4890         }
4891
4892         debug_print("getting session...\n");
4893         session = imap_session_get(folder);
4894         if (!session) {
4895                 return;
4896         }
4897
4898         if ((ok = imap_select(session, IMAP_FOLDER(folder), msginfo->folder,
4899             NULL, NULL, NULL, NULL, NULL, FALSE)) != MAILIMAP_NO_ERROR) {
4900                 return;
4901         }
4902         numlist.next = NULL;
4903         numlist.data = GINT_TO_POINTER(msginfo->msgnum);
4904
4905         if (IMAP_FOLDER_ITEM(item)->batching) {
4906                 /* instead of performing an UID STORE command for each message change,
4907                  * as a lot of them can change "together", we just fill in hashtables
4908                  * and defer the treatment so that we're able to send only one
4909                  * command.
4910                  */
4911                 debug_print("IMAP batch mode on, deferring flags change\n");
4912                 if (flags_set) {
4913                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_set_table,
4914                                 GINT_TO_POINTER(flags_set));
4915                         if (ht_data == NULL) {
4916                                 ht_data = g_new0(hashtable_data, 1);
4917                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4918                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_set_table,
4919                                         GINT_TO_POINTER(flags_set), ht_data);
4920                         }
4921                         ht_data->msglist = g_slist_prepend(ht_data->msglist, GINT_TO_POINTER(msginfo->msgnum));
4922                 }
4923                 if (flags_unset) {
4924                         ht_data = g_hash_table_lookup(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4925                                 GINT_TO_POINTER(flags_unset));
4926                         if (ht_data == NULL) {
4927                                 ht_data = g_new0(hashtable_data, 1);
4928                                 ht_data->item = IMAP_FOLDER_ITEM(item);
4929                                 g_hash_table_insert(IMAP_FOLDER_ITEM(item)->flags_unset_table,
4930                                         GINT_TO_POINTER(flags_unset), ht_data);
4931                         }
4932                         ht_data->msglist = g_slist_prepend(ht_data->msglist,
4933                                         GINT_TO_POINTER(msginfo->msgnum));
4934                 }
4935         } else {
4936                 debug_print("IMAP changing flags\n");
4937                 if (flags_set) {
4938                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_set, NULL, TRUE);
4939                         if (ok != MAILIMAP_NO_ERROR) {
4940                                 return;
4941                         }
4942                 }
4943
4944                 if (flags_unset) {
4945                         ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item), &numlist, flags_unset, NULL, FALSE);
4946                         if (ok != MAILIMAP_NO_ERROR) {
4947                                 return;
4948                         }
4949                 }
4950         }
4951         msginfo->flags.perm_flags = newflags;
4952         return;
4953 }
4954
4955 static gint imap_remove_msg(Folder *folder, FolderItem *item, gint uid)
4956 {
4957         gint ok;
4958         IMAPSession *session;
4959         gchar *dir;
4960         MsgNumberList numlist;
4961
4962         g_return_val_if_fail(folder != NULL, -1);
4963         g_return_val_if_fail(FOLDER_CLASS(folder) == &imap_class, -1);
4964         g_return_val_if_fail(item != NULL, -1);
4965
4966         debug_print("getting session...\n");
4967         session = imap_session_get(folder);
4968         if (!session) return -1;
4969
4970         ok = imap_select(session, IMAP_FOLDER(folder), item,
4971                          NULL, NULL, NULL, NULL, NULL, FALSE);
4972         if (ok != MAILIMAP_NO_ERROR) {
4973                 return ok;
4974         }
4975         numlist.next = NULL;
4976         numlist.data = GINT_TO_POINTER(uid);
4977
4978         ok = imap_set_message_flags
4979                 (session, IMAP_FOLDER_ITEM(item), &numlist, IMAP_FLAG_DELETED, NULL, TRUE);
4980         if (ok != MAILIMAP_NO_ERROR) {
4981                 log_warning(LOG_PROTOCOL, _("can't set deleted flags: %d\n"), uid);
4982                 return ok;
4983         }
4984
4985         ok = imap_cmd_expunge(session, folder->account->imap_use_trash);
4986
4987         if (ok != MAILIMAP_NO_ERROR) {
4988                 log_warning(LOG_PROTOCOL, _("can't expunge\n"));
4989                 return ok;
4990         }
4991
4992         IMAP_FOLDER_ITEM(item)->uid_list = g_slist_remove(
4993             IMAP_FOLDER_ITEM(item)->uid_list, numlist.data);
4994         dir = folder_item_get_path(item);
4995         if (is_dir_exist(dir))
4996                 remove_numbered_files(dir, uid, uid);
4997         g_free(dir);
4998         return MAILIMAP_NO_ERROR;
4999 }
5000
5001 static gint compare_msginfo(gconstpointer a, gconstpointer b)
5002 {
5003         return ((MsgInfo *)a)->msgnum - ((MsgInfo *)b)->msgnum;
5004 }
5005
5006 static guint gslist_find_next_num(MsgNumberList **list, guint num)
5007 {
5008         GSList *elem;
5009
5010         g_return_val_if_fail(list != NULL, -1);
5011
5012         for (elem = *list; elem != NULL; elem = g_slist_next(elem))
5013                 if (GPOINTER_TO_INT(elem->data) >= num)
5014                         break;
5015         *list = elem;
5016         return elem != NULL ? GPOINTER_TO_INT(elem->data) : (gint)-1;
5017 }
5018
5019 static gboolean flag_ok(IMAPFolderItem *item, guint flag)
5020 {
5021         if (item->ok_flags && g_slist_find(item->ok_flags, GUINT_TO_POINTER(flag))) {
5022                 debug_print("flag %d is OK\n", flag);
5023                 return TRUE;
5024         }
5025         if (item->can_create_flags == ITEM_CAN_CREATE_FLAGS) {
5026                 debug_print("creating flags is OK\n");
5027                 return TRUE;
5028         }
5029         return FALSE;
5030 }
5031
5032 /*
5033  * NEW and DELETED flags are not syncronized
5034  * - The NEW/RECENT flags in IMAP folders can not really be directly
5035  *   modified by Sylpheed
5036  * - The DELETE/DELETED flag in IMAP and Sylpheed don't have the same
5037  *   meaning, in IMAP it always removes the messages from the FolderItem
5038  *   in Sylpheed it can mean to move the message to trash
5039  */
5040
5041 typedef struct _get_flags_data {
5042         Folder *folder;
5043         FolderItem *item;
5044         MsgInfoList *msginfo_list;
5045         GHashTable *msgflags;
5046         gboolean full_search;
5047         gboolean done;
5048 } get_flags_data;
5049
5050 static /*gint*/ void *imap_get_flags_thread(void *data)
5051 {
5052         get_flags_data *stuff = (get_flags_data *)data;
5053         Folder *folder = stuff->folder;
5054         FolderItem *fitem = (FolderItem *) stuff->item;
5055         MsgInfoList *msginfo_list = stuff->msginfo_list;
5056         GHashTable *msgflags = stuff->msgflags;
5057         GSList *elem;
5058         carray * lep_uidtab;
5059         IMAPSession *session;
5060         gint ok;
5061         int r = MAILIMAP_NO_ERROR;
5062         GHashTable *flags_hash = NULL;
5063         GHashTable *tags_hash = NULL;
5064         gboolean full_search = stuff->full_search;
5065         GSList *sorted_list = NULL;
5066         GSList *unseen = NULL, *answered = NULL, *flagged = NULL, *deleted = NULL, *forwarded = NULL, *spam = NULL;
5067         GSList *seq_list, *cur;
5068         gboolean reverse_seen = FALSE;
5069         gboolean selected_folder;
5070         gint exists_cnt, unseen_cnt;
5071         gboolean got_alien_tags = FALSE;
5072
5073         session = imap_session_get(folder);
5074
5075         if (session == NULL) {
5076                 stuff->done = TRUE;
5077                 return GINT_TO_POINTER(-1);
5078         }
5079         selected_folder = (session->mbox != NULL) &&
5080                           (!strcmp(session->mbox, fitem->path));
5081
5082         lock_session(session);
5083         if (!selected_folder) {
5084                 ok = imap_select(session, IMAP_FOLDER(folder), fitem,
5085                         &exists_cnt, NULL, &unseen_cnt, NULL, NULL, TRUE);
5086                 if (ok != MAILIMAP_NO_ERROR) {
5087                         stuff->done = TRUE;
5088                         return GINT_TO_POINTER(-1);
5089                 }
5090
5091                 if (unseen_cnt > exists_cnt / 2)
5092                         reverse_seen = TRUE;
5093         }
5094         else {
5095                 if (fitem->unread_msgs > fitem->total_msgs / 2)
5096                         reverse_seen = TRUE;
5097         }
5098
5099         sorted_list = g_slist_sort(g_slist_copy(msginfo_list), compare_msginfo);
5100         if (!full_search) {
5101                 seq_list = imap_get_lep_set_from_msglist(IMAP_FOLDER(folder), msginfo_list);
5102         } else {
5103                 struct mailimap_set * set;
5104                 set = mailimap_set_new_interval(1, 0);
5105                 seq_list = g_slist_append(NULL, set);
5106         }
5107
5108         if (folder->account && folder->account->low_bandwidth) {
5109                 for (cur = seq_list; cur != NULL; cur = g_slist_next(cur)) {
5110                         struct mailimap_set * imapset;
5111                         clist * lep_uidlist;
5112                         int r;
5113
5114                         imapset = cur->data;
5115                         if (reverse_seen) {
5116                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SEEN, NULL,
5117                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5118                         }
5119                         else {
5120                                 r = imap_threaded_search(folder,
5121                                                          IMAP_SEARCH_TYPE_UNSEEN, NULL,
5122                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5123                         }
5124                         if (r == MAILIMAP_NO_ERROR) {
5125                                 GSList * uidlist;
5126
5127                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5128                                 mailimap_search_result_free(lep_uidlist);
5129
5130                                 unseen = g_slist_concat(unseen, uidlist);
5131                         } else {
5132                                 imap_handle_error(SESSION(session), NULL, r);
5133                                 goto bail;
5134                         }
5135
5136                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FLAGGED, NULL,
5137                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5138                         if (r == MAILIMAP_NO_ERROR) {
5139                                 GSList * uidlist;
5140
5141                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5142                                 mailimap_search_result_free(lep_uidlist);
5143
5144                                 flagged = g_slist_concat(flagged, uidlist);
5145                         } else {
5146                                 imap_handle_error(SESSION(session), NULL, r);
5147                                 goto bail;
5148                         }
5149
5150                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5151                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_ANSWERED, NULL,
5152                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5153                                 if (r == MAILIMAP_NO_ERROR) {
5154                                         GSList * uidlist;
5155
5156                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5157                                         mailimap_search_result_free(lep_uidlist);
5158
5159                                         answered = g_slist_concat(answered, uidlist);
5160                                 } else {
5161                                         imap_handle_error(SESSION(session), NULL, r);
5162                                         goto bail;
5163                                 }
5164
5165                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_FORWARDED)) {
5166                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_FORWARDED, NULL,
5167                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5168                                         if (r == MAILIMAP_NO_ERROR) {
5169                                                 GSList * uidlist;
5170
5171                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5172                                                 mailimap_search_result_free(lep_uidlist);
5173
5174                                                 forwarded = g_slist_concat(forwarded, uidlist);
5175                                         } else {
5176                                                 imap_handle_error(SESSION(session), NULL, r);
5177                                                 goto bail;
5178                                         }
5179                                 }
5180
5181                                 if (flag_ok(IMAP_FOLDER_ITEM(fitem), IMAP_FLAG_SPAM)) {
5182                                         r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_SPAM, NULL,
5183                                                                  NULL, full_search ? NULL:imapset, &lep_uidlist);
5184                                         if (r == MAILIMAP_NO_ERROR) {
5185                                                 GSList * uidlist;
5186
5187                                                 uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5188                                                 mailimap_search_result_free(lep_uidlist);
5189
5190                                                 spam = g_slist_concat(spam, uidlist);
5191                                         } else {
5192                                                 imap_handle_error(SESSION(session), NULL, r);
5193                                                 goto bail;
5194                                         }
5195                                 }
5196
5197                                 r = imap_threaded_search(folder, IMAP_SEARCH_TYPE_DELETED, NULL,
5198                                                          NULL, full_search ? NULL:imapset, &lep_uidlist);
5199                                 if (r == MAILIMAP_NO_ERROR) {
5200                                         GSList * uidlist;
5201
5202                                         uidlist = imap_uid_list_from_lep(lep_uidlist, NULL);
5203                                         mailimap_search_result_free(lep_uidlist);
5204
5205                                         deleted = g_slist_concat(deleted, uidlist);
5206                                 } else {
5207                                         imap_handle_error(SESSION(session), NULL, r);
5208                                         goto bail;
5209                                 }
5210                         }
5211                 }
5212
5213         } else {
5214                 r = imap_threaded_fetch_uid_flags(folder, 1, &lep_uidtab);
5215                 if (r == MAILIMAP_NO_ERROR) {
5216                         flags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5217                         tags_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, NULL);
5218                         imap_flags_hash_from_lep_uid_flags_tab(lep_uidtab, flags_hash, tags_hash);
5219                         imap_fetch_uid_flags_list_free(lep_uidtab);
5220                 } else {
5221                         imap_handle_error(SESSION(session), NULL, r);
5222                         goto bail;
5223                 }
5224         }
5225
5226 bail:
5227         if (r == MAILIMAP_NO_ERROR)
5228                 unlock_session(session);
5229
5230         for (elem = sorted_list; elem != NULL; elem = g_slist_next(elem)) {
5231                 MsgInfo *msginfo;
5232                 MsgPermFlags flags, oldflags;
5233                 gboolean wasnew;
5234
5235                 msginfo = (MsgInfo *) elem->data;
5236                 flags = msginfo->flags.perm_flags;
5237                 wasnew = (flags & MSG_NEW);
5238                 oldflags = flags & ~(MSG_NEW|MSG_UNREAD|MSG_REPLIED|MSG_FORWARDED|MSG_MARKED|MSG_DELETED|MSG_SPAM);
5239
5240                 if (folder->account && folder->account->low_bandwidth) {
5241                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5242                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW) | MSG_REPLIED | MSG_FORWARDED | MSG_MARKED | MSG_SPAM);
5243                         } else {
5244                                 flags &= ~((reverse_seen ? 0 : MSG_UNREAD | MSG_NEW | MSG_MARKED));
5245                         }
5246                         if (reverse_seen)
5247                                 flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5248                         if (gslist_find_next_num(&unseen, msginfo->msgnum) == msginfo->msgnum) {
5249                                 if (!reverse_seen) {
5250                                         flags |= MSG_UNREAD | (wasnew ? MSG_NEW : 0);
5251                                 } else {
5252                                         flags &= ~(MSG_UNREAD | MSG_NEW);
5253                                 }
5254                         }
5255
5256                         if (gslist_find_next_num(&flagged, msginfo->msgnum) == msginfo->msgnum)
5257                                 flags |= MSG_MARKED;
5258                         else
5259                                 flags &= ~MSG_MARKED;
5260
5261                         if (fitem->opened || fitem->processing_pending || fitem == folder->inbox) {
5262                                 if (gslist_find_next_num(&answered, msginfo->msgnum) == msginfo->msgnum)
5263                                         flags |= MSG_REPLIED;
5264                                 else
5265                                         flags &= ~MSG_REPLIED;
5266                                 if (gslist_find_next_num(&forwarded, msginfo->msgnum) == msginfo->msgnum)
5267                                         flags |= MSG_FORWARDED;
5268                                 else
5269                                         flags &= ~MSG_FORWARDED;
5270                                 if (gslist_find_next_num(&spam, msginfo->msgnum) == msginfo->msgnum)
5271                                         flags |= MSG_SPAM;
5272                                 else
5273                                         flags &= ~MSG_SPAM;
5274                                 if (gslist_find_next_num(&deleted, msginfo->msgnum) == msginfo->msgnum)
5275                                         flags |= MSG_DELETED;
5276                                 else
5277                                         flags &= ~MSG_DELETED;
5278                         }
5279                 } else {
5280                         if (flags_hash != NULL) {
5281
5282                                 flags = GPOINTER_TO_INT(g_hash_table_lookup(flags_hash,
5283                                                 GINT_TO_POINTER(msginfo->msgnum)));
5284                         }
5285
5286                         if ((flags & MSG_UNREAD) == 0)
5287                                 flags &= ~MSG_NEW;
5288                         else if (wasnew)
5289                                 flags |= MSG_NEW;
5290                         flags |= oldflags;
5291
5292                         if (tags_hash != NULL) {
5293                                 GSList *tags = g_hash_table_lookup(tags_hash, GINT_TO_POINTER(msginfo->msgnum));
5294                                 GSList *cur;
5295
5296                                 g_slist_free(msginfo->tags);
5297                                 msginfo->tags = NULL;
5298
5299                                 for (cur = tags; cur; cur = cur->next) {
5300                                         gchar *real_tag = imap_modified_utf7_to_utf8(cur->data, TRUE);
5301                                         gint id = 0;
5302                                         id = tags_get_id_for_str(real_tag);
5303                                         if (id == -1) {
5304                                                 id = tags_add_tag(real_tag);
5305                                                 got_alien_tags = TRUE;
5306                                         }
5307                                         msginfo->tags = g_slist_append(
5308                                                                 msginfo->tags,
5309                                                                 GINT_TO_POINTER(id));
5310                                         g_free(real_tag);
5311                                 }
5312                                 slist_free_strings_full(tags);
5313                         }
5314                 }
5315
5316                 g_hash_table_insert(msgflags, msginfo, GINT_TO_POINTER(flags));
5317         }
5318
5319         if (got_alien_tags) {
5320                 tags_write_tags();
5321                 main_window_reflect_tags_changes(mainwindow_get_mainwindow());
5322         }
5323
5324         if (flags_hash)
5325                 g_hash_table_destroy(flags_hash);
5326         if (tags_hash)
5327                 g_hash_table_destroy(tags_hash);
5328
5329         imap_lep_set_free(seq_list);
5330         g_slist_free(flagged);
5331         g_slist_free(deleted);
5332         g_slist_free(answered);
5333         g_slist_free(forwarded);
5334         g_slist_free(spam);
5335         g_slist_free(unseen);
5336         g_slist_free(sorted_list);
5337
5338         stuff->done = TRUE;
5339         return GINT_TO_POINTER(0);
5340 }
5341
5342 static gint imap_get_flags(Folder *folder, FolderItem *item,
5343                            MsgInfoList *msginfo_list, GHashTable *msgflags)
5344 {
5345         gint result;
5346         get_flags_data *data = g_new0(get_flags_data, 1);
5347         data->done = FALSE;
5348         data->folder = folder;
5349         data->item = item;
5350         data->msginfo_list = msginfo_list;
5351         data->msgflags = msgflags;
5352         data->full_search = FALSE;
5353
5354         GSList *tmp = NULL, *cur;
5355
5356         if (prefs_common.work_offline &&
5357             !inc_offline_should_override(FALSE,
5358                 _("Claws Mail needs network access in order "
5359                   "to access the IMAP server."))) {
5360                 g_free(data);
5361                 return -1;
5362         }
5363
5364         tmp = folder_item_get_msg_list(item);
5365
5366         if (g_slist_length(tmp) <= g_slist_length(msginfo_list))
5367                 data->full_search = TRUE;
5368
5369         for (cur = tmp; cur; cur = cur->next)
5370                 procmsg_msginfo_free((MsgInfo *)cur->data);
5371
5372         g_slist_free(tmp);
5373
5374         result = GPOINTER_TO_INT(imap_get_flags_thread(data));
5375
5376         g_free(data);
5377         return result;
5378
5379 }
5380
5381 static gboolean process_flags(gpointer key, gpointer value, gpointer user_data)
5382 {
5383         gboolean flags_set = GPOINTER_TO_INT(user_data);
5384         gint flags_value = GPOINTER_TO_INT(key);
5385         hashtable_data *data = (hashtable_data *)value;
5386         IMAPFolderItem *_item = data->item;
5387         FolderItem *item = (FolderItem *)_item;
5388         gint ok = MAILIMAP_ERROR_BAD_STATE;
5389         IMAPSession *session = NULL;
5390
5391         debug_print("getting session...\n");
5392         session = imap_session_get(item->folder);
5393
5394         data->msglist = g_slist_reverse(data->msglist);
5395
5396         debug_print("IMAP %ssetting flags to %d for %d messages\n",
5397                 flags_set?"":"un",
5398                 flags_value,
5399                 g_slist_length(data->msglist));
5400
5401         lock_session(session);
5402         if (session) {
5403                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5404                          NULL, NULL, NULL, NULL, NULL, FALSE);
5405         }
5406         if (ok == MAILIMAP_NO_ERROR) {
5407                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5408                         data->msglist, flags_value, NULL, flags_set);
5409         } else {
5410                 g_warning("can't select mailbox %s\n", item->path);
5411         }
5412
5413         if (!is_fatal(ok))
5414                 unlock_session(session);
5415
5416         g_slist_free(data->msglist);
5417         g_free(data);
5418         return TRUE;
5419 }
5420
5421 static gboolean process_tags(gpointer key, gpointer value, gpointer user_data)
5422 {
5423         gboolean tags_set = GPOINTER_TO_INT(user_data);
5424         TagsData *data = (TagsData *)value;
5425         IMAPFolderItem *_item = data->item;
5426         FolderItem *item = (FolderItem *)_item;
5427         gchar *str = data->str;
5428         gint ok = MAILIMAP_ERROR_BAD_STATE;
5429         IMAPSession *session = NULL;
5430
5431         debug_print("getting session...\n");
5432         session = imap_session_get(item->folder);
5433
5434         data->msglist = g_slist_reverse(data->msglist);
5435
5436         debug_print("IMAP %ssetting tags %s for %d messages\n",
5437                 tags_set?"":"un",
5438                 str,
5439                 g_slist_length(data->msglist));
5440
5441         lock_session(session);
5442         if (session) {
5443                 ok = imap_select(session, IMAP_FOLDER(item->folder), item,
5444                          NULL, NULL, NULL, NULL, NULL, FALSE);
5445         }
5446         if (ok == MAILIMAP_NO_ERROR) {
5447                 GSList list;
5448                 list.data = str;
5449                 list.next = NULL;
5450                 ok = imap_set_message_flags(session, IMAP_FOLDER_ITEM(item),
5451                         data->msglist, 0, &list, tags_set);
5452         } else {
5453                 g_warning("can't select mailbox %s\n", item->path);
5454         }
5455
5456         if (!is_fatal(ok))
5457                 unlock_session(session);
5458
5459         g_slist_free(data->msglist);
5460         g_free(data->str);
5461         g_free(data);
5462         return TRUE;
5463 }
5464
5465 static void process_hashtable(IMAPFolderItem *item)
5466 {
5467         if (item->flags_set_table) {
5468                 g_hash_table_foreach_remove(item->flags_set_table, process_flags, GINT_TO_POINTER(TRUE));
5469                 g_hash_table_destroy(item->flags_set_table);
5470                 item->flags_set_table = NULL;
5471         }
5472         if (item->flags_unset_table) {
5473                 g_hash_table_foreach_remove(item->flags_unset_table, process_flags, GINT_TO_POINTER(FALSE));
5474                 g_hash_table_destroy(item->flags_unset_table);
5475                 item->flags_unset_table = NULL;
5476         }
5477         if (item->tags_set_table) {
5478                 g_hash_table_foreach_remove(item->tags_set_table, process_tags, GINT_TO_POINTER(TRUE));
5479                 g_hash_table_destroy(item->tags_set_table);
5480                 item->tags_set_table = NULL;
5481         }
5482         if (item->tags_unset_table) {
5483                 g_hash_table_foreach_remove(item->tags_unset_table, process_tags, GINT_TO_POINTER(FALSE));
5484                 g_hash_table_destroy(item->tags_unset_table);
5485                 item->tags_unset_table = NULL;
5486         }
5487
5488 }
5489
5490 static void imap_set_batch (Folder *folder, FolderItem *_item, gboolean batch)
5491 {
5492         IMAPFolderItem *item = (IMAPFolderItem *)_item;
5493         IMAPSession *session;
5494
5495         g_return_if_fail(item != NULL);
5496
5497         if (item->batching == batch)
5498                 return;
5499
5500         if (batch) {
5501                 item->batching = TRUE;
5502                 debug_print("IMAP switching to batch mode\n");
5503                 if (!item->flags_set_table) {
5504                         item->flags_set_table = g_hash_table_new(NULL, g_direct_equal);
5505                 }
5506                 if (!item->flags_unset_table) {
5507                         item->flags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5508                 }
5509                 if (!item->tags_set_table) {
5510                         item->tags_set_table = g_hash_table_new(NULL, g_direct_equal);
5511                 }
5512                 if (!item->tags_unset_table) {
5513                         item->tags_unset_table = g_hash_table_new(NULL, g_direct_equal);
5514                 }
5515                 session = imap_session_get(folder);
5516                 if (session) {
5517                         imap_refresh_sensitivity(session);
5518                         session->sens_update_block = TRUE;
5519                 }
5520         } else {
5521                 debug_print("IMAP switching away from batch mode\n");
5522                 /* process stuff */
5523                 process_hashtable(item);
5524                 item->batching = FALSE;
5525                 session = imap_session_get(folder);
5526                 if (session) {
5527                         session->sens_update_block = FALSE;
5528                         imap_refresh_sensitivity(session);
5529                 }
5530         }
5531 }
5532
5533
5534
5535 /* data types conversion libetpan <-> claws */
5536
5537
5538
5539 #define ETPAN_IMAP_MB_MARKED      1
5540 #define ETPAN_IMAP_MB_UNMARKED    2
5541 #define ETPAN_IMAP_MB_NOSELECT    4
5542 #define ETPAN_IMAP_MB_NOINFERIORS 8
5543
5544 static int imap_flags_to_flags(struct mailimap_mbx_list_flags * imap_flags)
5545 {
5546   int flags;
5547   clistiter * cur;
5548
5549   flags = 0;
5550   if (imap_flags->mbf_type == MAILIMAP_MBX_LIST_FLAGS_SFLAG) {
5551     switch (imap_flags->mbf_sflag) {
5552     case MAILIMAP_MBX_LIST_SFLAG_MARKED:
5553       flags |= ETPAN_IMAP_MB_MARKED;
5554       break;
5555     case MAILIMAP_MBX_LIST_SFLAG_NOSELECT:
5556       flags |= ETPAN_IMAP_MB_NOSELECT;
5557       break;
5558     case MAILIMAP_MBX_LIST_SFLAG_UNMARKED:
5559       flags |= ETPAN_IMAP_MB_UNMARKED;
5560       break;
5561     }
5562   }
5563
5564   if (imap_flags->mbf_oflags) {
5565     for(cur = clist_begin(imap_flags->mbf_oflags) ; cur != NULL ;
5566         cur = clist_next(cur)) {
5567       struct mailimap_mbx_list_oflag * oflag;
5568
5569       oflag = clist_content(cur);
5570
5571       switch (oflag->of_type) {
5572       case MAILIMAP_MBX_LIST_OFLAG_NOINFERIORS:
5573         flags |= ETPAN_IMAP_MB_NOINFERIORS;
5574         break;
5575       }
5576     }
5577   }
5578   return flags;
5579 }
5580
5581 static GSList * imap_list_from_lep(IMAPFolder * folder,
5582                                    clist * list, const gchar * real_path, gboolean all)
5583 {
5584         clistiter * iter;
5585         GSList * item_list = NULL, *llast = NULL;
5586
5587         if (list) {
5588                 for(iter = clist_begin(list) ; iter != NULL ;
5589                     iter = clist_next(iter)) {
5590                         struct mailimap_mailbox_list * mb;
5591                         int flags;
5592                         char delimiter;
5593                         char * name;
5594                         char * dup_name;
5595                         gchar * base;
5596                         gchar * loc_name;
5597                         gchar * loc_path;
5598                         FolderItem *new_item;
5599
5600                         mb = clist_content(iter);
5601
5602                         if (mb == NULL)
5603                                 continue;
5604
5605                         flags = 0;
5606                         if (mb->mb_flag != NULL)
5607                                 flags = imap_flags_to_flags(mb->mb_flag);
5608
5609                         delimiter = mb->mb_delimiter;
5610                         name = mb->mb_name;
5611
5612                         dup_name = strdup(name);
5613                         if (delimiter != '\0')
5614                                 subst_char(dup_name, delimiter, '/');
5615
5616                         base = g_path_get_basename(dup_name);
5617                         if (base[0] == '.') {
5618                                 g_free(base);
5619                                 free(dup_name);
5620                                 continue;
5621                         }
5622                         if (!all && path_cmp(name, real_path) == 0) {
5623                                 g_free(base);
5624                                 free(dup_name);
5625                                 continue;
5626                         }
5627
5628                         if (!all && dup_name[strlen(dup_name)-1] == '/') {
5629                                 dup_name[strlen(dup_name)-1] = '\0';
5630                         }
5631
5632                         loc_name = imap_modified_utf7_to_utf8(base, FALSE);
5633                         loc_path = imap_modified_utf7_to_utf8(dup_name, FALSE);
5634
5635                         new_item = folder_item_new(FOLDER(folder), loc_name, loc_path);
5636                         if ((flags & ETPAN_IMAP_MB_NOINFERIORS) != 0)
5637                                 new_item->no_sub = TRUE;
5638                         if (strcmp(dup_name, "INBOX") != 0 &&
5639                             ((flags & ETPAN_IMAP_MB_NOSELECT) != 0))
5640                                 new_item->no_select = TRUE;
5641
5642                         if (item_list == NULL)
5643                                 llast = item_list = g_slist_append(item_list, new_item);
5644                         else {
5645                                 llast = g_slist_append(llast, new_item);
5646                                 llast = llast->next;
5647                         }
5648                         debug_print("folder '%s' found.\n", loc_path);
5649                         g_free(base);
5650                         g_free(loc_path);
5651                         g_free(loc_name);
5652
5653                         free(dup_name);
5654                 }
5655         }
5656         return item_list;
5657 }
5658
5659 static GSList * imap_get_lep_set_from_numlist(IMAPFolder *folder, MsgNumberList *numlist)
5660 {
5661         GSList *sorted_list, *cur;
5662         guint first, last, next;
5663         GSList *ret_list = NULL, *llast = NULL;
5664         struct mailimap_set * current_set;
5665         unsigned int item_count;
5666
5667         if (numlist == NULL)
5668                 return NULL;
5669
5670         current_set = mailimap_set_new_empty();
5671
5672         sorted_list = g_slist_copy(numlist);
5673         sorted_list = g_slist_sort(sorted_list, g_int_compare);
5674
5675         first = GPOINTER_TO_INT(sorted_list->data);
5676
5677         item_count = 0;
5678         for (cur = sorted_list; cur != NULL; cur = g_slist_next(cur)) {
5679                 if (GPOINTER_TO_INT(cur->data) == 0)
5680                         continue;
5681
5682                 item_count ++;
5683
5684                 last = GPOINTER_TO_INT(cur->data);
5685                 if (cur->next)
5686                         next = GPOINTER_TO_INT(cur->next->data);
5687                 else
5688                         next = 0;
5689
5690                 if (last + 1 != next || next == 0 || item_count >= folder->max_set_size) {
5691
5692                         struct mailimap_set_item * item;
5693                         item = mailimap_set_item_new(first, last);
5694                         mailimap_set_add(current_set, item);
5695
5696                         first = next;
5697
5698                         if (item_count >= folder->max_set_size) {
5699                                 if (ret_list == NULL)
5700                                         llast = ret_list = g_slist_append(ret_list,
5701                                                           current_set);
5702                                 else {
5703                                         llast = g_slist_append(llast, current_set);
5704                                         llast = llast->next;
5705                                 }
5706
5707                                 current_set = mailimap_set_new_empty();
5708                                 item_count = 0;
5709                         }
5710                 }
5711         }
5712
5713         if (clist_count(current_set->set_list) > 0) {
5714                 ret_list = g_slist_append(ret_list,
5715                                           current_set);
5716         }
5717
5718         g_slist_free(sorted_list);
5719
5720         return ret_list;
5721 }
5722
5723 static GSList * imap_get_lep_set_from_msglist(IMAPFolder *folder, MsgInfoList *msglist)
5724 {
5725         MsgNumberList *numlist = NULL;
5726         GSList *seq_list;
5727
5728         numlist = procmsg_get_number_list_for_msgs(msglist);
5729
5730         seq_list = imap_get_lep_set_from_numlist(folder, numlist);
5731         g_slist_free(numlist);
5732
5733         return seq_list;
5734 }
5735
5736 static GSList * imap_uid_list_from_lep(clist * list, gint* length)
5737 {
5738         clistiter * iter;
5739         GSList * result;
5740         gint len = 0;
5741
5742         result = NULL;
5743
5744         if (list) {
5745                 for(iter = clist_begin(list) ; iter != NULL ;
5746                     iter = clist_next(iter)) {
5747                         uint32_t * puid;
5748
5749                         puid = clist_content(iter);
5750                         result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5751                         len++;
5752                 }
5753                 result = g_slist_reverse(result);
5754         }
5755         if (length)
5756                 *length = len;
5757         return result;
5758 }
5759
5760 static GSList * imap_uid_list_from_lep_tab(carray * list)
5761 {
5762         unsigned int i;
5763         GSList * result;
5764
5765         result = NULL;
5766
5767         for(i = 0 ; i < carray_count(list) ; i ++) {
5768                 uint32_t * puid;
5769
5770                 puid = carray_get(list, i);
5771                 result = g_slist_prepend(result, GINT_TO_POINTER(* puid));
5772         }
5773         result = g_slist_reverse(result);
5774         return result;
5775 }
5776
5777 static void imap_flags_hash_from_lep_uid_flags_tab(carray * list,
5778                                                    GHashTable * hash,
5779                                                    GHashTable * tags_hash)
5780 {
5781         unsigned int i;
5782
5783         for(i = 0 ; i < carray_count(list) ; i += 3) {
5784                 uint32_t * puid;
5785                 int * pflags;
5786                 GSList *tags;
5787
5788                 puid = carray_get(list, i);
5789                 pflags = carray_get(list, i + 1);
5790                 tags = carray_get(list, i + 2);
5791
5792                 g_hash_table_insert(hash, GINT_TO_POINTER(*puid), GINT_TO_POINTER(* pflags));
5793                 g_hash_table_insert(tags_hash, GINT_TO_POINTER(*puid), tags);
5794         }
5795 }
5796
5797 static MsgInfo *imap_envelope_from_lep(struct imap_fetch_env_info * info,
5798                                        FolderItem *item)
5799 {
5800         MsgInfo *msginfo = NULL;
5801         guint32 uid = 0;
5802         goffset size = 0;
5803         MsgFlags flags = {0, 0};
5804
5805         if (info->headers == NULL)
5806                 return NULL;
5807
5808         MSG_SET_TMP_FLAGS(flags, MSG_IMAP);
5809         if (folder_has_parent_of_type(item, F_QUEUE)) {
5810                 MSG_SET_TMP_FLAGS(flags, MSG_QUEUED);
5811         } else if (folder_has_parent_of_type(item, F_DRAFT)) {
5812                 MSG_SET_TMP_FLAGS(flags, MSG_DRAFT);
5813         }
5814         flags.perm_flags = info->flags;
5815
5816         uid = info->uid;
5817         size = (goffset) info->size;
5818         msginfo = procheader_parse_str(info->headers, flags, FALSE, FALSE);
5819
5820         if (msginfo) {
5821                 msginfo->msgnum = uid;
5822                 msginfo->size = size;
5823         }
5824
5825         return msginfo;
5826 }
5827
5828 static void imap_lep_set_free(GSList *seq_list)
5829 {
5830         GSList * cur;
5831
5832         for(cur = seq_list ; cur != NULL ; cur = g_slist_next(cur)) {
5833                 struct mailimap_set * imapset;
5834
5835                 imapset = cur->data;
5836                 mailimap_set_free(imapset);
5837         }
5838         g_slist_free(seq_list);
5839 }
5840
5841 static struct mailimap_flag_list * imap_flag_to_lep(IMAPFolderItem *item, IMAPFlags flags, GSList *tags)
5842 {
5843         struct mailimap_flag_list * flag_list;
5844         GSList *cur = tags;
5845
5846         flag_list = mailimap_flag_list_new_empty();
5847
5848         if (IMAP_IS_SEEN(flags))
5849                 mailimap_flag_list_add(flag_list,
5850                                        mailimap_flag_new_seen());
5851         if (IMAP_IS_ANSWERED(flags))
5852                 mailimap_flag_list_add(flag_list,
5853                                        mailimap_flag_new_answered());
5854         if (IMAP_IS_FLAGGED(flags))
5855                 mailimap_flag_list_add(flag_list,
5856                                        mailimap_flag_new_flagged());
5857         if (IMAP_IS_DELETED(flags))
5858                 mailimap_flag_list_add(flag_list,
5859                                        mailimap_flag_new_deleted());
5860         if (IMAP_IS_DRAFT(flags))
5861                 mailimap_flag_list_add(flag_list,
5862                                        mailimap_flag_new_draft());
5863         if (IMAP_IS_FORWARDED(flags) && flag_ok(item, IMAP_FLAG_FORWARDED))
5864                 mailimap_flag_list_add(flag_list,
5865                                        mailimap_flag_new_flag_keyword(strdup(RTAG_FORWARDED)));
5866         if (IMAP_IS_SPAM(flags) && flag_ok(item, IMAP_FLAG_SPAM))
5867                 mailimap_flag_list_add(flag_list,
5868                                        mailimap_flag_new_flag_keyword(strdup(RTAG_JUNK)));
5869         else if (IMAP_IS_HAM(flags) && flag_ok(item, IMAP_FLAG_HAM))
5870                 mailimap_flag_list_add(flag_list,
5871                                        mailimap_flag_new_flag_keyword(strdup(RTAG_NON_JUNK)));
5872
5873         for (; cur; cur = cur->next) {
5874                 gchar *enc_str =
5875                         imap_utf8_to_modified_utf7(cur->data, TRUE);
5876                 g_strstrip(enc_str);
5877
5878                 mailimap_flag_list_add(flag_list,
5879                         mailimap_flag_new_flag_keyword(enc_str));
5880         }
5881
5882         return flag_list;
5883 }
5884
5885 guint imap_folder_get_refcnt(Folder *folder)
5886 {
5887         return ((IMAPFolder *)folder)->refcnt;
5888 }
5889
5890 void imap_folder_ref(Folder *folder)
5891 {
5892         ((IMAPFolder *)folder)->refcnt++;
5893 }
5894
5895 void imap_disconnect_all(gboolean have_connectivity)
5896 {
5897         GList *list;
5898         gboolean short_timeout;
5899 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5900         GError *error;
5901 #endif
5902
5903 #ifdef HAVE_NETWORKMANAGER_SUPPORT
5904         error = NULL;
5905         short_timeout = !networkmanager_is_online(&error);
5906         if(error) {
5907                 short_timeout = TRUE;
5908                 g_error_free(error);
5909         }
5910 #else
5911         short_timeout = TRUE;
5912 #endif
5913
5914         if(short_timeout)
5915                 imap_main_set_timeout(1);
5916
5917         for (list = account_get_list(); list != NULL; list = list->next) {
5918                 PrefsAccount *account = list->data;
5919                 if (account->protocol == A_IMAP4) {
5920                         RemoteFolder *folder = (RemoteFolder *)account->folder;
5921                         if (folder && folder->session) {
5922                                 if (imap_is_busy(FOLDER(folder)))
5923                                         imap_threaded_cancel(FOLDER(folder));
5924
5925                                 IMAPSession *session = (IMAPSession *)folder->session;
5926                                 if (have_connectivity)
5927                                         imap_threaded_disconnect(FOLDER(folder));
5928                                 SESSION(session)->state = SESSION_DISCONNECTED;
5929                                 SESSION(session)->sock = NULL;
5930                                 imap_safe_destroy(session);
5931                                 folder->session = NULL;
5932                         }
5933                 }
5934         }
5935
5936         if(short_timeout)
5937                 imap_main_set_timeout(prefs_common.io_timeout_secs);
5938 }
5939
5940 void imap_folder_unref(Folder *folder)
5941 {
5942         if (((IMAPFolder *)folder)->refcnt > 0)
5943                 ((IMAPFolder *)folder)->refcnt--;
5944 }
5945
5946 void imap_cancel_all(void)
5947 {
5948         GList *folderlist;
5949         GList *cur;
5950
5951         folderlist = folder_get_list();
5952         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5953                 Folder *folder = (Folder *) cur->data;
5954
5955                 if (folder->klass == &imap_class) {
5956                         if (imap_is_busy(folder)) {
5957                                 IMAPSession *imap_session;
5958                                 RemoteFolder *rfolder;
5959
5960                                 g_printerr("cancelled\n");
5961                                 imap_threaded_cancel(folder);
5962                                 rfolder = (RemoteFolder *) folder;
5963                                 imap_session = (IMAPSession *) rfolder->session;
5964                                 if (imap_session)
5965                                         imap_session->cancelled = 1;
5966                         }
5967                 }
5968         }
5969 }
5970
5971 gboolean imap_cancel_all_enabled(void)
5972 {
5973         GList *folderlist;
5974         GList *cur;
5975
5976         folderlist = folder_get_list();
5977         for (cur = folderlist; cur != NULL; cur = g_list_next(cur)) {
5978                 Folder *folder = (Folder *) cur->data;
5979
5980                 if (folder->klass == &imap_class) {
5981                         if (imap_is_busy(folder)) {
5982                                 return TRUE;
5983                         }
5984                 }
5985         }
5986
5987         return FALSE;
5988 }
5989
5990 static gboolean imap_is_busy(Folder *folder)
5991 {
5992         IMAPSession *imap_session;
5993         RemoteFolder *rfolder;
5994
5995         rfolder = (RemoteFolder *) folder;
5996         imap_session = (IMAPSession *) rfolder->session;
5997         if (imap_session == NULL)
5998                 return FALSE;
5999
6000         return imap_session->busy;
6001 }
6002
6003 #else /* HAVE_LIBETPAN */
6004
6005 static FolderClass imap_class;
6006
6007 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item);
6008 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag);
6009
6010 static Folder   *imap_folder_new        (const gchar    *name,
6011                                          const gchar    *path)
6012 {
6013         static gboolean missing_imap_warning = TRUE;
6014         if (missing_imap_warning) {
6015                 missing_imap_warning = FALSE;
6016                 alertpanel_error(
6017                         _("You have one or more IMAP accounts "
6018                           "defined. However this version of "
6019                           "Claws Mail has been built without "
6020                           "IMAP support; your IMAP account(s) are "
6021                           "disabled.\n\n"
6022                           "You probably need to "
6023                           "install libetpan and recompile "
6024                           "Claws Mail."));
6025         }
6026         return NULL;
6027 }
6028 static gint     imap_create_tree        (Folder         *folder)
6029 {
6030         return -1;
6031 }
6032 static FolderItem *imap_create_folder   (Folder         *folder,
6033                                          FolderItem     *parent,
6034                                          const gchar    *name)
6035 {
6036         return NULL;
6037 }
6038 static gint     imap_rename_folder      (Folder         *folder,
6039                                          FolderItem     *item,
6040                                          const gchar    *name)
6041 {
6042         return -1;
6043 }
6044
6045 gchar imap_get_path_separator_for_item(FolderItem *item)
6046 {
6047         return '/';
6048 }
6049
6050 FolderClass *imap_get_class(void)
6051 {
6052         if (imap_class.idstr == NULL) {
6053                 imap_class.type = F_IMAP;
6054                 imap_class.idstr = "imap";
6055                 imap_class.uistr = "IMAP4";
6056
6057                 imap_class.new_folder = imap_folder_new;
6058                 imap_class.create_tree = imap_create_tree;
6059                 imap_class.create_folder = imap_create_folder;
6060                 imap_class.rename_folder = imap_rename_folder;
6061
6062                 imap_class.set_xml = folder_set_xml;
6063                 imap_class.get_xml = folder_get_xml;
6064                 imap_class.item_set_xml = imap_item_set_xml;
6065                 imap_class.item_get_xml = imap_item_get_xml;
6066                 /* nothing implemented */
6067         }
6068
6069         return &imap_class;
6070 }
6071
6072 void imap_disconnect_all(gboolean have_connectivity)
6073 {
6074 }
6075
6076 gint imap_subscribe(Folder *folder, FolderItem *item, gchar *rpath, gboolean sub)
6077 {
6078         return -1;
6079 }
6080
6081 GList * imap_scan_subtree(Folder *folder, FolderItem *item, gboolean unsubs_only, gboolean recursive)
6082 {
6083         return NULL;
6084 }
6085
6086 void imap_cache_msg(FolderItem *item, gint msgnum)
6087 {
6088 }
6089
6090 void imap_cancel_all(void)
6091 {
6092 }
6093
6094 gboolean imap_cancel_all_enabled(void)
6095 {
6096         return FALSE;
6097 }
6098
6099 #endif
6100
6101 #ifdef HAVE_LIBETPAN
6102 static void imap_synchronise(FolderItem *item, gint days)
6103 {
6104         if (IMAP_FOLDER_ITEM(item)->last_sync == IMAP_FOLDER_ITEM(item)->last_change) {
6105                 debug_print("%s already synced\n", item->path?item->path:item->name);
6106                 return;
6107         }
6108         debug_print("syncing %s\n", item->path?item->path:item->name);
6109         imap_gtk_synchronise(item, days);
6110         IMAP_FOLDER_ITEM(item)->last_sync = IMAP_FOLDER_ITEM(item)->last_change;
6111 }
6112 #endif
6113
6114 static void imap_item_set_xml(Folder *folder, FolderItem *item, XMLTag *tag)
6115 {
6116 #ifdef HAVE_LIBETPAN
6117         GList *cur;
6118 #endif
6119         folder_item_set_xml(folder, item, tag);
6120
6121 #ifdef HAVE_LIBETPAN
6122         for (cur = tag->attr; cur != NULL; cur = g_list_next(cur)) {
6123                 XMLAttr *attr = (XMLAttr *) cur->data;
6124
6125                 if (!attr || !attr->name || !attr->value) continue;
6126                 if (!strcmp(attr->name, "uidnext"))
6127                         IMAP_FOLDER_ITEM(item)->uid_next = atoi(attr->value);
6128                 if (!strcmp(attr->name, "last_sync"))
6129                         IMAP_FOLDER_ITEM(item)->last_sync = atoi(attr->value);
6130                 if (!strcmp(attr->name, "last_change"))
6131                         IMAP_FOLDER_ITEM(item)->last_change = atoi(attr->value);
6132         }
6133         if (IMAP_FOLDER_ITEM(item)->last_change == 0)
6134                 IMAP_FOLDER_ITEM(item)->last_change = time(NULL);
6135 #endif
6136 }
6137
6138 static XMLTag *imap_item_get_xml(Folder *folder, FolderItem *item)
6139 {
6140         XMLTag *tag;
6141
6142         tag = folder_item_get_xml(folder, item);
6143
6144 #ifdef HAVE_LIBETPAN
6145         xml_tag_add_attr(tag, xml_attr_new_int("uidnext",
6146                         IMAP_FOLDER_ITEM(item)->uid_next));
6147         xml_tag_add_attr(tag, xml_attr_new_int("last_sync",
6148                         IMAP_FOLDER_ITEM(item)->last_sync));
6149         xml_tag_add_attr(tag, xml_attr_new_int("last_change",
6150                         IMAP_FOLDER_ITEM(item)->last_change));
6151
6152 #endif
6153         return tag;
6154 }
6155
6156 /* ===================================================================
6157  * UTF-7 conversion routines as in RFC 2192
6158  * ===================================================================
6159  * These two functions from:
6160  * libimap library.
6161  * Copyright (C) 2003-2004 Pawel Salek. */
6162
6163 /* UTF7 modified base64 alphabet */
6164 static char base64chars[] =
6165   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
6166 #define UNDEFINED 64
6167
6168 /* UTF16 definitions */
6169 #define UTF16MASK       0x03FFUL
6170 #define UTF16SHIFT      10
6171 #define UTF16BASE       0x10000UL
6172 #define UTF16HIGHSTART  0xD800UL
6173 #define UTF16HIGHEND    0xDBFFUL
6174 #define UTF16LOSTART    0xDC00UL
6175 #define UTF16LOEND      0xDFFFUL
6176
6177
6178 /* Convert an IMAP mailbox to a UTF-8 string.
6179  *  dst needs to have roughly 4 times the storage space of src
6180  *    Hex encoding can triple the size of the input
6181  *    UTF-7 can be slightly denser than UTF-8
6182  *     (worst case: 8 octets UTF-7 becomes 9 octets UTF-8)
6183  */
6184 char* imap_modified_utf7_to_utf8(const char *mbox, gboolean change_spaces)
6185 {
6186   unsigned c, i, bitcount;
6187   unsigned long ucs4, utf16, bitbuf;
6188   unsigned char base64[256];
6189   const char *src;
6190   char *dst, *res  = g_malloc(2*strlen(mbox)+1);
6191
6192   dst = res;
6193   src = mbox;
6194   if(!dst) return NULL;
6195   /* initialize modified base64 decoding table */
6196   memset(base64, UNDEFINED, sizeof (base64));
6197   for (i = 0; i < sizeof (base64chars); ++i) {
6198     base64[(unsigned)base64chars[i]] = i;
6199   }
6200
6201   /* loop until end of string */
6202   while (*src != '\0') {
6203     c = *src++;
6204     /* deal with literal characters and &- */
6205     if (c != '&' || *src == '-') {
6206       /* encode literally */
6207       if (change_spaces && c == '_')
6208         *dst++ = ' ';
6209       else
6210         *dst++ = c;
6211       /* skip over the '-' if this is an &- sequence */
6212       if (c == '&') ++src;
6213     } else {
6214       /* convert modified UTF-7 -> UTF-16 -> UCS-4 -> UTF-8 -> HEX */
6215       bitbuf = 0;
6216       bitcount = 0;
6217       ucs4 = 0;
6218       while ((c = base64[(unsigned char) *src]) != UNDEFINED) {
6219         ++src;
6220         bitbuf = (bitbuf << 6) | c;
6221         bitcount += 6;
6222         /* enough bits for a UTF-16 character? */
6223         if (bitcount >= 16) {
6224           bitcount -= 16;
6225           utf16 = (bitcount ? bitbuf >> bitcount
6226                    : bitbuf) & 0xffff;
6227           /* convert UTF16 to UCS4 */
6228           if
6229             (utf16 >= UTF16HIGHSTART && utf16 <= UTF16HIGHEND) {
6230             ucs4 = (utf16 - UTF16HIGHSTART) << UTF16SHIFT;
6231             continue;
6232           } else if
6233             (utf16 >= UTF16LOSTART && utf16 <= UTF16LOEND) {
6234             ucs4 += utf16 - UTF16LOSTART + UTF16BASE;
6235           } else {
6236             ucs4 = utf16;
6237           }
6238
6239           /* convert UTF-16 range of UCS4 to UTF-8 */
6240           if (ucs4 <= 0x7fUL) {
6241             dst[0] = ucs4;
6242             dst += 1;
6243           } else if (ucs4 <= 0x7ffUL) {
6244             dst[0] = 0xc0 | (ucs4 >> 6);
6245             dst[1] = 0x80 | (ucs4 & 0x3f);
6246             dst += 2;
6247           } else if (ucs4 <= 0xffffUL) {
6248             dst[0] = 0xe0 | (ucs4 >> 12);
6249             dst[1] = 0x80 | ((ucs4 >> 6) & 0x3f);
6250             dst[2] = 0x80 | (ucs4 & 0x3f);
6251             dst += 3;
6252           } else {
6253             dst[0] = 0xf0 | (ucs4 >> 18);
6254             dst[1] = 0x80 | ((ucs4 >> 12) & 0x3f);
6255             dst[2] = 0x80 | ((ucs4 >> 6) & 0x3f);
6256             dst[3] = 0x80 | (ucs4 & 0x3f);
6257             dst += 4;
6258           }
6259         }
6260       }
6261       /* skip over trailing '-' in modified UTF-7 encoding */
6262       if (*src == '-') ++src;
6263     }
6264   }
6265   /* terminate destination string */
6266   *dst = '\0';
6267   return res;
6268 }
6269
6270 /* Convert hex coded UTF-8 string to modified UTF-7 IMAP mailbox
6271  *  dst should be about twice the length of src to deal with non-hex
6272  *  coded URLs
6273  */
6274 char* imap_utf8_to_modified_utf7(const char *src, gboolean change_spaces)
6275 {
6276   unsigned int utf8pos, utf8total, c, utf7mode, bitstogo, utf16flag;
6277   unsigned long ucs4 = 0, bitbuf = 0;
6278
6279   /* initialize hex lookup table */
6280   char *dst, *res;
6281
6282   if (!src) return NULL;
6283
6284   res = malloc(2*strlen(src)+1);
6285   dst = res;
6286   if(!dst) return NULL;
6287
6288   utf7mode = 0;
6289   utf8total = 0;
6290   bitstogo = 0;
6291   utf8pos = 0;
6292   while ((c = (unsigned char)*src) != '\0') {
6293     ++src;
6294     /* normal character? */
6295     if (c >= ' ' && c <= '~' && (c != '_' || !change_spaces)) {
6296       /* switch out of UTF-7 mode */
6297       if (utf7mode) {
6298         if (bitstogo) {
6299           *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6300         }
6301         *dst++ = '-';
6302         utf7mode = 0;
6303         utf8pos  = 0;
6304         bitstogo = 0;
6305         utf8total= 0;
6306       }
6307       if (change_spaces && c == ' ')
6308         *dst++ = '_';
6309       else
6310         *dst++ = c;
6311       /* encode '&' as '&-' */
6312       if (c == '&') {
6313         *dst++ = '-';
6314       }
6315       continue;
6316     }
6317     /* switch to UTF-7 mode */
6318     if (!utf7mode) {
6319       *dst++ = '&';
6320       utf7mode = 1;
6321     }
6322     /* Encode US-ASCII characters as themselves */
6323     if (c < 0x80) {
6324       ucs4 = c;
6325     } else if (utf8total) {
6326       /* save UTF8 bits into UCS4 */
6327       ucs4 = (ucs4 << 6) | (c & 0x3FUL);
6328       if (++utf8pos < utf8total) {
6329         continue;
6330       }
6331     } else {
6332       utf8pos = 1;
6333       if (c < 0xE0) {
6334         utf8total = 2;
6335         ucs4 = c & 0x1F;
6336       } else if (c < 0xF0) {
6337         utf8total = 3;
6338         ucs4 = c & 0x0F;
6339       } else {
6340         /* NOTE: can't convert UTF8 sequences longer than 4 */
6341         utf8total = 4;
6342         ucs4 = c & 0x03;
6343       }
6344       continue;
6345     }
6346     /* loop to split ucs4 into two utf16 chars if necessary */
6347     utf8total = 0;
6348     do {
6349       if (ucs4 >= UTF16BASE) {
6350         ucs4 -= UTF16BASE;
6351         bitbuf = (bitbuf << 16) | ((ucs4 >> UTF16SHIFT)
6352                                    + UTF16HIGHSTART);
6353         ucs4 = (ucs4 & UTF16MASK) + UTF16LOSTART;
6354         utf16flag = 1;
6355       } else {
6356         bitbuf = (bitbuf << 16) | ucs4;
6357         utf16flag = 0;
6358       }
6359       bitstogo += 16;
6360       /* spew out base64 */
6361       while (bitstogo >= 6) {
6362         bitstogo -= 6;
6363         *dst++ = base64chars[(bitstogo ? (bitbuf >> bitstogo)
6364                               : bitbuf)
6365                              & 0x3F];
6366       }
6367     } while (utf16flag);
6368   }
6369   /* if in UTF-7 mode, finish in ASCII */
6370   if (utf7mode) {
6371     if (bitstogo) {
6372       *dst++ = base64chars[(bitbuf << (6 - bitstogo)) & 0x3F];
6373     }
6374     *dst++ = '-';
6375   }
6376   /* tie off string */
6377   *dst = '\0';
6378   return res;
6379 }